America's most advanced ballistic solver!

This app incorporates the use of Bluetooth with :

Wind meters
Ultrasonic wind devices
Environmental tools
Some of the Range Finders that send: Range, Compass, Inclination, Atmospherics to the EB app (more coming)

Revic BR4
Revic BLR 10 series
Newcon
Onic
Swarovski coming soon!
Some Vortex

Wind devices Bluetooth supported (may be more we have not tried}

Weather flow
Kestrel
Wind Zero
Calypso mini (NOT AB supported model)

Mapping using

Google maps
MilGPS for Mapping and target Acquisition (or our favorite )

Here is a brief list of what this app does currently.

Wind speed using a wind meter with Bluetooth
MPH lead calculator
Wind Average
Angle modified range
Coriolis (horizontal)
Vertical Eötvös
Spindrift
Aerodynamic jump
Tripod shooting error correction
Valley wind calculations error correction
Max ordinate calculations
Retained energy on impact
Retained velocity on impact
Flight time
Scope correction factor calculator tool
Ballistic coefficient or muzzle velocity (Truing)
Grabs from the phone; latitude/Longitude and station pressure
Provides rpms of bullet for failure warning
Provide gyroscopic stability factor of the bullet
Shows the client max hunting capability of the bullet by type, lead core / copper jacket, copper solids
Adjust for gravity at location
Speed of sound
Supersonic/Transonic/Subsonic truing
Measuring animals tool
Ranging with reticle
Measuring sight height
With app or using calipers
Zero angle or range
Uses camera @ 10 power for angle and compass direction when not using a rangefinders
Bluetooth to most Bluetooth capable rangefinders for instant feed back
Provides speed of sound, Transonic ranges for Truing
MOA or MIL
Multiple range cards
Email and print icons
Multiple rifles
Bullet library
PRS Mode allows lanes and targets with relative wind as well as variant in wind speeds and multiple BC truing
Sensitive checking
Accuracy analysis
Detailed analysis of bullet flight
Grabs local temperature and Humidity automatically, but is overridden by device if connected
Warning colors when objects left on
Tool for measuring zero height and offset
Our bullet Library is gathered from multiple Bullet manufactures websites and emailed tables from them, BC's may not match what your gun is providing, use the truing option to find your own BC
Google Maps drop pin for hunting
Metric or Imperial settings

built-in Tools For Long Range

This app incorporates the use of Bluetooth with : Wind meters, Ultrasonic wind devices: Wind zero and Calypso mini (Not AB), Environmental tools, Range Finders like the Revic and others, animal tracking with MilGPS for Mapping and much more!

QR CODE FOR 20 STAGES IN PRS

How to use: Save it to your photos, push in the center and load it in EB!

MOVING TARGET CALCULATOR

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

ANIMAL SIZING AND RANGEING TOOL

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

ANIMAL SIZING AND RANGEING TOOL

MEASURE SCOPE HEIGHT

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

ANIMAL SIZING AND RANGEING TOOL

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

ANGLE AND INCLINATION TOOL

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

SCOPE TRACKING CORRECTION CALCULATOR

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

SCOPE TRACKING CORRECTION CALCULATOR

App instructional Videos

Range Card

Loading Stages from QR Code

Multi mode / PRS

Multi mode (PRS) and Military

This is a table of lanes and targets. There can be up to 30 lanes, each with up to 5 targets. This can be used to add, edit, and delete lanes and targets

Mover Tool

Timing movers for MPH and leads

Tripod Tool

This will help fix muzzle jump - vertical error with a hinting weight rifle at long range.

Measuring animals or Ranging with Reticle

Measuring animals or Ranging with Reticle for the trophy hunter!

Accuracy and Sensitivity

Accuracy and Sensitivity tool,

This tool is used to understand how inaccuracy in the parameters you have entered for your rifle, scope, bullet, or target affect the point of impact.

Circular Error Probable

One of the important analysis is the Circular Error Probable (CEP). This determine the minimum size circle of error which contains a certain fraction of impacts. This tool provides an inner CEP of 50% and an outer circle of 95%. The circles correspond to the area that will be impacted with 50% and 95% of the time, respectively.

App instructional Videos

Build a Rifle Profile

Hud is used for configuring parameters for your firearm. Changes made to the parameters listed here are immediately applied to your setup and reflected in the HUD and range cards.

These are the parameters of your rifle and scope that affect the bullet and its trajectory

Measure Sight Height

James go's over our new tool for measuring you scope height

Truing BC

Settings Gear

Range Card

Measuring animals or Ranging with Reticle

Measuring animals or Ranging with Reticle for the trophy hunter!

Mover Tool

Timing movers for MPH and leads

Tripod Tool

This will help fix muzzle jump - vertical error with a hinting weight rifle at long range.

Accuracy and Sensitivity

Accuracy and Sensitivity tool,

This tool is used to understand how inaccuracy in the parameters you have entered for your rifle, scope, bullet, or target affect the point of impact.

Circular Error Probable

Scope Correction factor

Purchase Jig

How to average your wind

How to average your wind .

Truing Velocity or BC

Video Link

Muzzle Velocity and Ballistic Coefficient Truing Tool

This tool is used for truing the values for your Muzzle Velocity or Ballistic coefficient. The process for truing both of these is similar and both will be covered here.

Should I true the Muzzle Velocity or Ballistic Coefficient? Our recommendation depends on whether you have an accurate Chronograph available. If you do not have a Chronograph, we recommend truing the Muzzle Velocity. If you do have a Chronograph, we recommend first measuring the Muzzle Velocity using the Chronograph and then truing the Ballistic Coefficient using this tool.

Instructions

Be sure to true scope correction before truing muzzle velocity or ballistic coefficient.

Enter all parameters for your firearm and confirm your normal zero
Select a Range based on this tool's recommendation. The recommended range is around 15% before the range at which the bullet is 1.2 times the speed of sound.
Fire on target and adjust turret until on target.
Enter turret value into Required Dial Up field.
Choose to true either Muzzle Velocity or Ballistic Coefficient.
Review calculated trued value.
- If Error is shown, then the difference required to true the firearm was too large. You may have entered an incorrect value or need to start with more accurate values first.
- If Unchanged is shown, then the firearm is already trued. Nothing further needs to be done.
- If a value is shown, this is the value calculated for the Ballistic Coefficient or Muzzle Velocity which would result in impact at the given range. If trued value is acceptable, press Set to switch to that value.

Sensitivity Tool

Video Link

Sensitivity Tool

This shows an analysis of how sensitive point of impact is to parameters. The purpose is to provide a sense of the relative importance of different parameters.

These analyses are calculated by solving for the amount of change required in one parameter to cause impact to change by a given amount. In the analysis, all other parameters are left unchanged. The distance solved for in the analysis is 1in for Imperial and 2.5cm for metric).

It is important to understand that sensitivity may be dependent on the other parameters. For instance, different parameters have different importance at different ranges. Latitude affects the significance of Azimuth and its impact on earth-based effects.

The same analysis is made for both positive and negative variation; sometimes these can differ substantially.

In some cases, a variable may not have any (or only a very small) effect on the point of impact. These may be reported as NA in the table.

Range Card

Video

Range Card

This tab is used to generate range cards and other data based on your configuration.

For any of the cards, you may choose to email or print the card using the buttons in the toolbar.

Range

This card shows standard ballistic data for varying ranges.

Range: distance corresponding to this row of the card
Path: how are the bullet is below the scope reticle at this range. This distance is given both in a linear distance (inch/cm) and scope angle (MOA/mil).
Drift: how are the bullet has drifted left or right. This is given in both linear distance (inch/cm) and scope angle (MOA/mil).
Velocity: projectile velocity at this range.
Energy: energy of the projectile at this range.
TOF (Time-of-Flight): time since bullet has left muzzle.

Wind

This card shows ballistic data for varying winds. This card can be useful to quickly make wind holds based on changes in wind speed and direction.

Wind Speed: wind speed in MPH or km/h.
Elevation: Scope setting for this wind. This may have small changes with wind caused by Aerodynamic Jump.
Wind Hold: The hold required for this wind.

Detailed

This card provides details about current firing configuration.

Label

Create a small table of dial up and wind holds. This is intended to be printed and taped to your rifle stock as a quick reference to be used at shorter ranges if a more complete solution is not available. Ranges are only included out to 500yd (500m and wind speeds up to 5 MPH (metric: 10 km/h). The ballistic solutions are calculated for zero inclination, no earth effects (Coriolis or Eötvös), and no target movement.

Hud

Video

HUD Settings

These settings control operation of the Heads Up Display (HUD). They are available in the Settings, but are provided here for quick access.

Using Tripod: When enabled, this indicates you are shooting from a tripod. Use of a tripod can allow a certain amount of barrel rise, requiring an adjustment in order to impact target. When enabled, a warning is shown in the HUD so you remember to turn it off.
Target Mode: This allows selecting between Single and Multi. Single Target Mode is used for individual targets. Multi-Target Mode allows organizing sets of targets which will be shot in groups. When Multi-Target Mode is selected, (1) the HUD no longer shows information about impact and instead shows listings for up to 5 targets in the current group, (2) the current selected target and those after it are shown if they are in the same group, (3) Rain and Mirage selectors are shown in smaller form.
Max Ordinate Units: By default, Max Ordinate is expressed as a scope angle (MOA or mil). This allows the shooter/spotter to know the approximate location in the scope. When this is enabled, the Max Ordinate is shown in distance (feet or meters).
Hold for Aerodynamic Jump (Single): When enabled, vertical holds are split into two components: the portions not affected by wind and the portion that is. The first is summed and rounded to your scope turret units to be dialed in. The second is a vertical hold you can make based on changes in the wind. The purpose of this is to make it easier to hold for Aerodynamic Jump. When making these calculations, the full accuracy is retained when determining the hold so that any fraction not used in the turret adjustment is included in the vertical hold. Because of this, there may be a non-zero vertical hold even when no wind is present. Note that this affects both the HUD and the Wind Card on the Range Card.
Relative Wind (Multi): When enabled, the Wind Direction for targets is adjusted according to the relative Azimuth compared to the selected target (which has a highlighted border). This allows the wind direction to be set once for the selected target and have it automatically adjusted for the other targets. This also causes the adjusted relative wind to be shown for each target in the HUD table.
Moving Targets: When enabled, moving targets are supported. This causes the Mover Speed setting within Target section to be shown and additional Mover Speed and Mover Hold fields to be shown in the HUD. Holds for moving targets are not incorporated into the holds; only an incremental hold is shown, which must be added/subtracted to the wind hold according to direction of movement. If not in use, you may wish to turn this off to reduce clutter on the HUD.
Show Temperature & Pressure: When enabled, Temperature and Pressure are shown in the HUD. You may wish to disable this to reduce clutter.
Prefer MOA Fractions: When enabled, fractions (e.g., ¼) will used in the HUD in place of decimal values. This may be helpful in making turret adjustments. This setting only affects MOA-based turrets (not mil). Fractions will also be used in other situations, when appropriate.
Inclination & Azimuth Tool: When enabled, the internal accelerometer sensor in your device will be used in the Inclination & Azimuth Tool to determine your angle of inclination.

Moving Targets

Video

Mover Speed Tool

This tool estimates the speed of a moving target using range, your scope reticle, and a timer.

Use of this tool requires a rifle or spotting scope with an appropriate reticle. The reticle must have measurements. Please be sure to refer to your rifle scope manual to ensure you know how to correctly read measurements with your reticle. See Rifle Scope section below for more information.

This assumes you know the Range to the target. If you do not know the range, you can use the Ranging Tool to estimate this.

After the range has been determined, there are two methods to using this tool: Known Distance Method and Known Time Method. In each method, you will first set the Movement Distance or Movement Time and the use your scope reticle and a Timer or Stop Watch to determine the other parameter. The steps for each method are provided below.

Settings

These are the settings and controls used to operate the tool.

Range: The range to the target. This is used with the Reticle value to determine the distance the target moves. Changing this value affects other parts of this app.
Reticle: The observed angle measured by your scope reticle for the amount of distance the target moves. Changing this value causes the Movement Distance to be updated.
Movement Distance: The observed amount of motion of the target. Normally, the Reticle is used and this value is only read for confirmation. However, in some cases it may be easier to estimate distance of movement, such as if there are large objects in the field of view of know size. Changing this value causes the Reticle measurement to be updated.
Time: Amount of time the target moved across the given distance. You can enter a value here or use the Stop Watch to measure a time.
Mover Speed: This is the calculated speed of the target.
Set Mover Speed: Press Set to change the mover speed to the calculated speed and close this tool.
Timer / Stop Watch Selection: This selects the mode of the time button either as a Stop Watch or Timer.
Timer Button: This button operates a Timer or Stop Watch depending on the mode selected. The button is intended to be operated while looking in your rifle scope so it is very large and vibrates. For improved accuracy, the button is triggered when you touch it (most IOS buttons are triggered when you lift up).

In Timer mode, the button is pressed once to start a timer based on the current Time value. The timer counts down the time and it alerts when expired. It vibrates once when started. It vibrates twice and flashes the screen when it expires. This mode is used with the Known Time Method.

In Stop Watch mode, the button is pressed twice: once to start a stop watch and a second time to stop the watch and store the elapsed time in the Time field (and update the estimated Mover Speed). It vibrates once when started and twice when stopping. This mode is used with the Known Movement Distance Method.

Methods

Known Time Method

With this method, the Range and Time are determined in advance and the Reticle is measured while using the Timer.

Set mode to Timer.
Ensure Range is correct.
Enter desired time in Time.
Observe target in scope.
Press Start button.
When timer expires, enter reticle distance the target has moved in Reticle.
Confirm Movement Distance and Speed values.
Press the Set button.

Known Distance Method

With this method, the Range and Reticle are determined and the Time is measured with the Stop Watch.

Set mode to Stop Watch.
Ensure Range is correct.
Enter desired distance in Reticle.
Observe target in scope.
Press Start button.
Press Stop button when target has moved the expected distance.
Confirm Time and Speed values.
Press the Set button.

Rifle Scope

It is important to know what focal plane your scope uses. You can determine this by changing the magnification level. If the reticle size changes with magnification level, then the scope uses first focal plane. If the reticle size remains the same, then the scope uses second focal plane.

First Focal Plane: This is the preferred type of scope. First focal plane reticles change size as you adjust your scope magnification. A first focal plane scope reticle can be used at any magnification level.
Second Focal Plane: Care must be used when measuring angles with this type of scope. The reticle stays the same size regardless of magnification. Reticle measurements are only valid at a specific magnification level.This is commonly the highest magnification; sometimes it is a magnification level marked on the numbering with a tick. We recommend using this tool only when a second-focal plane scope is at this magnification level.
For other magnification levels, any reticle measurements must be adjusted appropriately. For instance, if you use 1/2 the magnification level, then the reticle measurements will be double (2x).

Measuring animals or ranging with reticle

Video

Ranging Tool

This tool is used for ranging and sizing targets with the reticle on your rifle scope.

Use of this tool requires a rifle scope with an appropriate reticle. The reticle must have measurements. Please be sure to refer to your rifle scope manual to ensure you know how to correctly read measurements with your reticle.

First Focal Plane: This is the preferred type of scope. First focal plane reticles change size as you adjust your scope magnification. A first focal plane scope reticle can be used at any magnification level.
Second Focal Plane: Care must be used when measuring angles with this type of scope. The reticle stays the same size regardless of magnification. Reticle measurements are only valid at a specific magnification level. This is commonly the highest magnification; sometimes it is a magnification level marked on the numbering with a tick. We recommend using this tool only when a second-focal plane scope is at this magnification level.
For other magnification levels, any reticle measurements must be adjusted appropriately. For instance, if you use 1/2 the magnification level, then the reticle measurements will be double (2x).

Sizing

This tool calculates the size of objects using known range to the object and your scope reticle.

Range: The range to the target. Changing this value will affect other parts of this app.
Reticle: The observed angle measured by your scope reticle.
Object Size: The calculated size of the object.

Ranging

This tool calculates range to a target using known size of the object and your scope reticle.

Object Size: The size of the object.
Reticle: The observed angle measured by your scope reticle.
Range: The calculated range to the target.
Set Range: Pressing this button sets the calculated range to be the new target range.

Hunting

This section lists various common hunting animals and their typical size, measured as the distance from back to brisket. Pressing the button next to the animal will set the Object Size to this size. You can use these buttons to quickly set the object size.

Scope Correction Factor Tool

VIDEO

The Scope Correction Factor is used to account for error in vertical holds with your rifle scope. The default correction factor is 1.00000, which indicates no correction is required for your scope.

Determining your Scope Correction Factor should only be necessary once for the scope, since the correction factor normally remains the same for the life of the scope.

This process is often called the Tall Target Test as it involves firing at a tall target at short ranges.

The instructions below describe firing on the tall target. An alternative method is to secure your scope in a fixed jig which ensures the scope has no movement. This alternative does not require firing on the target and may be somewhat more accurate.

Instructions

Select a short range of around 50-100 yd. A short range is used so that there are almost no ballistic effects on the bullet.
Select a tall target to use. The target should be tall enough that the bullet will still impact when you dial the turret. You can use this tool to calculate the required size of the target.
Place a target at range of around 50-100 yd. A short enough range should be used that there are almost no ballistic effects on the bullet. The target should be placed vertically (as measured with a level or plumb) and have a vertical line its entire length (again, measured with a level or plumb).
Carefully measure the range and enter in Range field.
Set rifle scope turret to zero.
Shoot near the bottom of target.
Dial turret to a large value. We recommend at least 30 MOA.
Enter this in the Dial Up field.
Shoot at target again.
Carefully measure distance between groups and enter this as Actual Impact.
Review the calculated correction factor and press Set Scope Correction Factor. Going forward correction factor will be multiplied by any vertical holds.

Accuracy Analysis Tool

This tool is used to understand how inaccuracy in the parameters you have entered for your rifle, scope, bullet, or target affect the point of impact.

Circular Error Probable

The CEP values selected by this tool do not match those used in the CEP link. While CEP can be associated with normal distributions and standard deviations, the CEP displayed by this tool are calculated by sorting the results of the Monte Carlo simulation, not by multiplying the standard deviation.

Results

The results of the simulation can be shown either in Graphical or Table display.

Graphical

In Graphical display, the simulated points of impact are shown on a target display. Each simulated shot is shown as a small red circle. The target is automatically scaled according to how much dispersion the bullets have. The center of the target (marked by black cross hairs) shows desired point of impact.

A grid is with 1 MOA or 0.1 mrad spacing is shown.

Green shaded rings are shown for 50% and 95% CEP. A final circle is shown for the maximum error distance. When using a Normal Distribution this final ring can be fairly large due to a high-error shot with low probability.

An option circular or square plate may be shown, if the option is enabled.

A small secondary green cross-hair is shown for the average impact point which is normally near the target center, but may vary depending on the type of error introduced.

Table

The Table display shows a numerical analysis of the dispersion. An Average and Maximum Error is shown. For each axis, the Minimum, Maximum, Average, and Standard Deviation are shown.

Values are shown both in absolute distance as well as MOA or mrad units.

Circular Error Probable values are shown for the 50% and 95% of samples.

If enabled, hit probability for a circular or square plate is shown.

Monte Carlo Simulation

The Monte Carlo method is used for the analysis. This simply means that a simulation is repeatedly run. For each simulation, the tool selects random error based on selections you make and then simulates the shot based on the randomly chosen amount of error. After simulating a given number of times, the results are analyzed and displayed to show the pattern of impact that could occur.

Samples

The number of samples used for the Monte Carlo simulation. More samples can improve accuracy of the results but requires more time. This defaults to 1000. The minimum value is 1 and maximum value is 10,000.

Distribution

There are two types of error distributions used by this tool: Linear Distribution and Normal Distribution. A background in statistics may be helpful to fully understand this setting.

Linear Distribution

With a Linear Distribution, the error values will fall in the range of +/- error for each selected error value. Each possible value has the same probability as any other. The error values will all fall into the range and will never exceed the give error value.

Important: The error values will extend over a range that is 2x the error value you enter. For instance, if you enter a Zero Offset error of 1in, then the error at the given 100yd range will be over 2 x 1in = 2in, which roughly corresponds to a 2 MOA range. For 1 MOA, you would use a value of 0.5 in.

Normal Distribution

With a Normal Distribution, the error value you enter is the the standard deviation of the error. As such, 68% of error values will be within the given range of error, +/-. If a muzzle velocity error of 10fps is set, then 68% of error will be in the range -10fps to +10fps (a total range of 20fps) of the muzzle velocity set for the bullet. This means some errors (approximately 32%) will fall outside this range.

Recalculate

The Recalculate button causes the simulation to be re-run. There is normally not a need to use this since new simulations are run whenever a value is changed.

Plate

An optional plate may be specified using the following settings. When enabled, the simulation tracks the probability of hitting the plate.

The point of aim for the simulation is the center of the plate. Note that in some situations the type of error may move the average point of impact from the center and the shooter may benefit from not using the center of the target as the point of aim. This effect is not accounted for in this analysis since the center of the target is used as the point of aim.

The plate will be shown in graphical display as a gray circle/square. In the table display, the hit/miss analysis and percentage are shown.

Enable: Enables/disables use of the plate.
Shape: Allows selection of circular or square plate.
Size: Specifies the size of the plate. This is the diameter of the circle or the length of the sides of the square.

Parameters

For each of the parameters, you can choose whether or not to introduce error for that parameter and (if so) how much error. By default, no error is introduced and all shots impact the center of the target.

When a parameter is changed, a new simulation is automatically started and the results are shown as soon as completed. There may be a small delay running the simulation.

The parameters may be individually enabled/disabled and the size of distribution adjusted. If error for a parameter is enabled but the amount of error is left at 0, this is the same as disabling that error.

You can enable as many or as few parameters as you choose. If no parameters are enabled, then the simulation will show no error. If a single parameter is selected, then only a single source of error is shown. As parameters are added, these are incorporated into the simulation. If all parameters are enabled, then all will be varied in the simulations.

Final Notes

Error parameters are shared among all rifles and are not saved with them. If you change rifles, the error parameters will be unchanged.

Zero Inclination Lock is ignored for the purposes of the simulation. It is treated as though it were turned off.

Building a Rifle Profile and Settings

Video

Building a Rifle Profile and Settings

This tab is used for configuring parameters for your firearm. Changes made to the parameters listed here are immediately applied to your setup and reflected in the HUD and range cards.

Rifle & Scope

These are the parameters of your rifle and scope that affect the bullet and its trajectory.

Name: Name to label rifle. The name has no effect on the rifle performance.
Rifle Twist: This is the twist rate of your rifle, measured in length (in/cm) per complete revolution. The twist rate should have been provided by your firearm manufacturer. If unsure, you can insert a cleaning rod and carefully measure the distance the rod must be inserted to make a full 360° rotation.
Scope Turret: The units for your scope turrets (and reticle). This is normally either MOA (minutes of angle) or mrad (milliradians, mil). You can normally find the units by looking at the current adjustment, possibly after removing the turret cap. MOA is typically given in quarter units (0.25 MOA). mrad is are typically adjusted in tenths (.1 mrad).
Scope Height: This is the height of the scope above your barrel. You can use the provided Scope Height Tool. Use calipers to measure the distance from the center of your barrel to the center of your rifle scope. This will normally be 1-3in.
Scope Correction: This is a correction factor to adjust for any error in the vertical movement of your scope. This can be an important factor when shooting at long-range with correspondingly large turret adjustment. You can use the provided provided Scope Correction Tool for this.

Bullet

These are the parameters of your bullet that affect its flight.

You can enter them manually as described below. Alternatively, you may wish to use parameters from the catalog included with this program. Press the catalog button next to Bullet, select a Caliber, Brand, and Model. Press Ok to accept the values from the catalog. The catalog will provide all parameters except Lot and Muzzle Velocity (muzzle velocity will be specific to your rifle and bullet combination).

Name: Name to label rifle. The name has no effect on the rifle performance.
Caliber: The diameter of your projectile. This can be found from your bullet manufacturer and is typically listed on the package.
Length: The length of your bullet. This can be found from your bullet manufacturer and is typically listed on the package. This value is important for the gyroscopic stability of your bullet.
Mass: The mass of your bullet. This is typically measured in grains. This can be found from your bullet manufacturer is typically listed on the package.
Lot: The lot of your bullet as listed on your ammunition package. This is useful for record keeping purposes. When changing ammunition lot, you may wish to check your zero.
Ballistic Coefficient: The ballistic efficiency of the bullet as it moves through air. A value is typically provided by your bullet manufacturer and is listed on the package. This program only uses the G7 ballistic coefficient. Be sure not to use other coefficients, such as the older G1.If you have a chronometer, you should measure the muzzle velocity for your actual firearm and then use our Ballistic Coefficient Truing Tool to determine the actual value of the Ballistic Coefficient. If you do not have a chronometer, you should use the approximate value from your manufacturer.
Muzzle Velocity: The speed of the bullet as it exits the muzzle. An approximate value is typically provided by your bullet manufacturer and is listed on the package and this may be a good starting point. The actual muzzle velocity will be determined by your rifle and bullet combination and will normally not match the generic value provided by the manufacturer. If you have a chronometer, you should measure the muzzle velocity for your actual rifle. If you do not have a chronometer, you can use our Muzzle Velocity Truing Tool to determine the actual value.
Spin Rate: The rate at which the bullet is spinning when it leaves the muzzle. This value is calculated and is direct function of Rifle Twist and Muzzle Velocity. It is recommended to have a spin below 300,000 RPM since too high of a spin can cause bullet to malfunction. If spin rate is too high, this is highlighted in yellow. This can be corrected by using bullets with lower muzzle velocity or switching to a rifle with a longer Rifle Twist. See also documentation on Gyroscopic Stability.
Gyroscopic Stability: The stability of the bullet from the spin imparted by rifling. This is calculated as a complex function of rifle twist, bullet caliber, length, ballistic coefficient, and muzzle velocity. Higher numbers are more stable. A gyroscopic stability of at least 1.6 is recommended. If the calculated gyroscopic stability is below this value, this will be highlighted in yellow. This can be corrected by using heavier/longer/higher-velocity bullets or a rifle with shorter rifle twist. See also documentation on Spin Rate.

Zero

The zero section contains information about how the rifle was zeroed. These are the parameters of how you set your zero.

Range: The distance at which you zeroed your rifle. This is typically 100yd or small multiples of that. It is important that your Zero Range be accurate. An inaccurate range will result in inaccuracies when calculating solutions for longer ranges.
Height: The height above (for negative: below) the zero for the point of impact. If your zero was the same as the point of impact, this can be left as 0.
Offset: The distance to right (for negative: to left) of the zero for the point of impact. If your zero was the same as the point of impact, this can be left as 0.
Scope Angle: This shows the calculated angle between rifle and scope. This is an important component of any firing solution. The default is for this to be calculated prior to any solution. In most cases it is recommended to lock this value immediately after zeroing. This will retain accuracy if you later use the rifle under different conditions. For example, consider if a rifle is zeroed and then taken into high mountains. By locking the angle, the conditions under which the rifle was zeroed are effectively stored in the angle value. This allows accurate solutions to be calculated for the new conditions without re-zeroing the rifle.
Important: If you re-zero your rifle it is necessary to unlock and re-lock this setting so the new angle can be calculated.

Environment

These are the environmental factors that that affect your bullet's flight.

Pressure: The air pressure. This is measured with barometric sensor. If you turn on Use Pressure from Device, the internal sensor in your phone will be used.
Temperature: The ambient air temperature. If your range finder provides this data, you can use it. Otherwise, you can enter manually.
Humidity: The humidity of the air. If your range finder provides this data, you can use it. Otherwise, you can enter manually.
Density: The density of the air around you. This is calculated based on Pressure, Temperature, and Humidity

Wind

Wind is a crucial factor for accurate shooting at longer ranges. Normally, wind is entered in the HUD or by the Mirage or Rain tool in the HUD.

Speed: The speed of the wind.
Direction (Relative): The direction of the wind, relative to the direction to the target. This is expressed in clock values. Note that wind direction is given as the direction the wind is coming from, not its direction of motion. A 3 O'Clock wind is moving from left to right.

Target

The following parameters are related to an individual target.

Folder: (Only present when in Multi-Target Mode.) A folder button can be pressed to see the table of current targets.
Name: (Only present when in Multi-Target Mode.) This is used to name the current target.
Range: The range to the target. If you have a range finder, this will be provided automatically. Otherwise, you will enter it manually. You can also use the provided Ranging Tool to estimate the range.
Inclination: The angle you are shooting up or down, measured in degrees. If you are shooting flat, this is 0°. If you are using a range finder with appropriate sensor, this will be entered automatically. You can use the provided Inclination and Azimuth Tool which calculates inclination using the device's internal accelerometer.
Angle Modified Range: The horizontal range to your target. This is calculated using Range and Inclination values and gives indication of horizontal distance to your target. The calculation is range x cos(inclination)
Latitude: Your current position on Earth. This is measured in degrees and is needed to determine Coriolis-based effects. You can enable Use Device Latitude to automatically fill this using your devices internal GPS sensor.
Azimuth: The direction to your target, measured in degrees from True North. This is used to determine Coriolis based effects. Inclination and Azimuth Tool which uses your device's internal compass.
Using Tripod: When enabled, this indicates you are shooting from a tripod. Use of a tripod can allow a certain amount of barrel rise, requiring an adjustment in order to impact target. Important: This option is not associated with specific target and must be turned on/off as needed.
Speed: (Only if Moving Targets is enabled in the options below.) The lateral (left/right) speed of a moving target. No direction is indicated. You can use the provided Mover Speed Tool to estimate the mover speed using range, your scope reticle, and a timer.

Impact

The following values are calculated for the bullet impact on target.

Time of Flight: The time from your bullet leaving muzzle to impacting the target. This is calculated using the other values you have entered.
Retained Velocity: The velocity of your bullet at the point of impact. This is calculated using other values you have provided. For hunting, it is recommended that velocity be at least 1600fps for lead core bullets or 2000fps for copper core bullets so that the bullet can function correctly. This value is highlighted in red or yellow if the calculated velocity is below these values.
Retained Energy: The energy of your bullet at the point of impact. This is calculated using the other values you have provided.
Impact Angle: The angle of motion at impact for your projectile. This is relative to your line-of-sight (scope angle). This is shown both in angle and in incline (in/yard or cm/meter). This may be helpful to estimate the effect incorrect range will have on your bullet's point of impact.

Diagnostics

The following values are calculated and provide information about your firearms operation under the current conditions.

Speed of Sound: The speed of sound in current conditions
Transonic Range: The range beyond which your projectile will no longer be supersonic.
Max Hunting Range (Copper): The range beyond which your projectile will no longer be at least 2000 ft/s. 2000 ft/s is recommended as the minimum velocity for copper core bullets to function properly. This is calculated for 0° inclination (the entered Inclination is not used).
Max Hunting Range (Lead): The range beyond which your projectile will no longer be at least 1600 ft/s. 1600 ft/s is recommended as the minimum velocity for lead core bullets to function properly. This is calculated for 0° inclination (the entered Inclination is not used).
Accuracy Analysis: Press this button to see an simulation analysis of impact patterns based on error data you enter. See the Help there for more information.
Sensitivity: Press this button to present an analysis of how sensitive point of impact is for each parameter. The purpose is to provide a sense of the relative importance of different parameters. See the Help there for more information.

HUD

These settings are control operation of the Heads Up Display (HUD).

Target Mode: This allows selecting between Single and Multi. Single Target Mode is used for individual targets. Multi-Target Mode allows organizing sets of targets which will be shot in groups. When Multi-Target Mode is selected, (1) the HUD no longer shows information about impact and instead shows listings for up to 5 targets in the current group, (2) the current selected target and those after it are shown if they are in the same group, (3) Rain and Mirage selectors are shown in smaller form.
Max Ordinate Units: By default, Max Ordinate is expressed as a scope angle (MOA or mil). This allows the shooter/spotter to know the approximate location in the scope. When this is enabled, the Max Ordinate is shown in distance (feet or meters).
Hold for Aerodynamic Jump (Hunting): When enabled, vertical holds are split into two components: the portions not affected by wind and the portion that is. The first is summed and rounded to your scope turret units to be dialed in. The second is a vertical hold you can make based on changes in the wind. The purpose of this is to make it easier to hold for Aerodynamic Jump. When making these calculations, the full accuracy is retained when determining the hold so that any fraction not used in the turret adjustment is included in the vertical hold. Because of this, there may be a non-zero vertical hold even when no wind is present. Note that this affects both the HUD and the Wind Card on the Range Card.
Relative Wind (Multi): When enabled, the Wind Direction for targets is adjusted according to the difference in Azimuth between the selected target (which has a highlighted border). This allows the wind direction to be set once for the selected target and have it automatically adjusted for the other targets. This also causes the adjusted relative wind to be shown for each target in the HUD table.
Moving Targets: When enabled, moving targets are supported. This causes the Mover Speed setting within Target section to be shown and additional Mover Speed and Mover Hold fields to be shown in the HUD. Holds for moving targets are not incorporated into the holds; only an incremental hold is shown, which must be added/subtracted to the wind hold according to direction of movement. If not in use, you may wish to turn this off to reduce clutter on the HUD.
Show Temperature & Pressure: When enabled, Temperature and Pressure are shown in the HUD. You may wish to disable this to reduce clutter.
Prefer MOA Fractions: When enabled, fractions (e.g., ¼) will used in the HUD in place of decimal values. This may be helpful in making turret adjustments. This setting only affects MOA-based turrets (not mil).
Inclination & Azimuth Tool: When enabled, the internal accelerometer sensor in your device will be used in the Inclination & Azimuth Tool to determine your angle of inclination.

The following values are used to configure behavior of this app.

Units: Select use of Imperial or Metric units.
Use Device Pressure: When enabled, the barometric pressure in your device will be used to set the air pressure.
Use Device Latitude: When enabled, the internal GPS sensor in your device will be used to automatically set the Latitude.
Adjust Gravity to Location: When enabled, gravity is calculated according to latitude and altitude (as reported by device).

Lanes

Lane Table

This is a table of lanes and targets. There can be up to 30 lanes, each with up to 5 targets. This can be used to add, edit, and delete lanes and targets.

Select a target: Tap on a target to select it.
Add Lane: To add a lane, press the plus (+) button in the menu.
Add Target to Lane: To add a target to a lane, press the plus (+) button in the header for the lane. When a lane is full (5 targets), the plus button is no longer shown.
Remove Target: To remove a target, press Edit then Delete the desired target.
Remove Lane: Remove all targets from lane. When the last target in a lane has been remove, that lane is removes.
Re-order Targets / Move Target to a new Lane: Press Edit, slide targets up/down to the new locations. Press Edit again to stop editing.

Shooting off a Tripod

Video

This will help fix muzzle jump - vertical error with a hinting weight rifle at long range.

Valley Winds

Video

Used to add to wind meter wind at you when shooting into a valley or Canyon.

Settings Gear

Video

Information for the Settings Gear

Multi Target Mode (PRS)

Video

For use in PRS or multi targets lanes

Measuring Scope Height

VIDEO

input for your rifle data point Scope Height

Connection a wind meter or drop for temp/pressure

VIDEO

select the device in the devices tab

Averaging wind speed

Video

allows the app to average wind speeds with a link wind meter

Quick switch Tool

VIDEO

Allow fast transition between tools for that section

PRS HUD QR Code

Email, Scan or use you camera to send and receive Stages and Lanes between users as well as rifle profiles.

James Eagleman is the Master Instructor at

Barbour Creek Long Range Shooting School

www.barbourcreek.com

eagleballistics@gmail.com

james@eagleballistics.com

Phone : 615-308-8498

At Eagle Ballistics, our mission is to provide shooters of all levels with the best possible Ballistic program to help them perform at their best.

This Solver is a compilation of 34 years of long range shooting. We developed the app for our students at Barbour Creek, but the solver has become overwhelmingly sought after by others-we decided to release it to the public minus 2 items: Rain and mirage. Everything else is available.

About the founder

1SG (RET) James Eagleman is a 26-year Army, Sniper and Master Instructor. He was selected as the Honor Graduate of the U.S. Army Sniper School and U.S. Army Sniper Training Course (5th SFG) Graduate. James was a Master Instructor for the US Army, teaching ITC. He has the distinct ability to take the most difficult ballistic subject and teach it in a manner that anyone can understand and apply. Because of his unique training abilities, he is recognized by many as one of the best long-range instructors in the civilian world today and is also the former Director of Shooting Instruction for Gunwerks Long-Range University.

James not only brings years of military experience with combat and expeditionary deployments overseas, but also has many years training civilians in long-range hunting, internal, and external ballistics. His revolutionary wind calling technique is considered by many to be the most comprehensive taught anywhere in the world. He has been featured on the television show “Long Range Pursuit,” “Precision Hunting TV,” “Spiritual Adventure Outdoors,” and “The High Road with Keith Warren,” as well as numerous firearms blogs, articles, and instructional videos. His passion is training students in the art of Long-Range Hunting, as well as watching them learn and grow. James’s wind reading techniques are so accurate they are sought after by civilian Hunters, US Military snipers and United Kingdom Snipers.

James goal is to provide our clients with the skills and knowledge to make that once-in-a-lifetime shot whenever and wherever it presents itself.

Multi or PRS mode is a favorite of PRS competitors!

to learn from James go to: www.barbourcreek.com

Privacy Policy

Eagle Ballistics LLC built the Eagle Ballistics app. This SERVICE is provided by Eagle Ballistics LLC is with a Subscription and is intended for use as is.

This page is used to inform visitors regarding our policies with the collection, use, and disclosure of Personal Information if anyone decided to use our Service.

If you choose to use our Service, then you agree to the collection and use of information in relation to this policy. The Personal Information that we collect is used for providing and improving the Service. We will not use or share your information with anyone except as described in this Privacy Policy.

The terms used in this Privacy Policy have the same meanings as in our Terms and Conditions, which are accessible at Eagle Ballistics unless otherwise defined in this Privacy Policy.

Information Collection by us

None.

Log Data

We want to inform you that whenever you use our Service, in a case of an error in the app we collect data and information (through third-party products) on your phone called Log Data. This Log Data may include information such as your device Internet Protocol (“IP”) address, device name, operating system version, the configuration of the app when utilizing our Service, the time and date of your use of the Service, and other statistics.

Cookies

Cookies are files with a small amount of data that are commonly used as anonymous unique identifiers. These are sent to your browser from the websites that you visit and are stored on your device's internal memory.

This Service does not use these “cookies” explicitly. However, the app may use third-party code and libraries that use “cookies” to collect information and improve their services. You have the option to either accept or refuse these cookies and know when a cookie is being sent to your device. If you choose to refuse our cookies, you may not be able to use some portions of this Service.

Service Providers

We may employ third-party companies like Apple due to the following reasons:

· To facilitate our Service;

· To provide the Service on our behalf;

· To perform Service-related services; or

· To assist us in analyzing how our Service is used..

Security

We value your trust in providing us your Personal Information, thus we are striving to use commercially acceptable means of protecting it. But remember that no method of transmission over the internet, or method of electronic storage is 100% secure and reliable, and we cannot guarantee its absolute security.

Links to Other Sites

This Service may contain links to other sites. If you click on a third-party link, you will be directed to that site.

Children’s Privacy

We do not knowingly collect personally identifiable information from children. We encourage all children to never submit any personally identifiable information through the Application and/or Services. We encourage parents and legal guardians to monitor their children's Internet usage and to help enforce this Policy by instructing their children never to provide personally identifiable information through the Application and/or Services without their permission. If you have reason to believe that a child has provided personally identifiable information to us through the Application and/or Services, please contact us. You must also be at least 17 years of age to consent to the processing of your personally identifiable information in your country (in some countries we may allow your parent or guardian to do so on your behalf).

iPhone use

This app uses your camera for certain functions.

location for latitude.

Angle inclinometer.

Reads pressure from the iPhone.

Changes to This Privacy Policy

We may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes. We will notify you of any changes by posting the new Privacy Policy on this page.

This policy is effective as of 2024-02-25

Contact Us

If you have any questions or suggestions about our Privacy Policy, do not hesitate to contact us at james@eagleballistics.com or

eagleballistics@gmail.com

Office Phone: 615-308-8498

Eagle Ballistics

Eagle Ballistics

Last Update March 2025

Winners Circle Using Eagle Ballistics

Eagle Ballistics Photo Gallery

built-in Tools For Long Range

This app incorporates the use of Bluetooth with : Wind meters, Ultrasonic wind devices: Wind zero and Calypso mini (Not AB), Environmental tools, Range Finders like the Revic and others, animal tracking with MilGPS for Mapping and much more!

QR CODE FOR 20 STAGES IN PRS

MOVING TARGET CALCULATOR

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

ANIMAL SIZING AND RANGEING TOOL

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

ANIMAL SIZING AND RANGEING TOOL

MEASURE SCOPE HEIGHT

TRUE BC's IN SUPER, TRANS AND SUB IN PRS MODE / SUPERSONIC IN LONG RANGE MODE

ANIMAL SIZING AND RANGEING TOOL

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

ANGLE AND INCLINATION TOOL

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

SCOPE TRACKING CORRECTION CALCULATOR

VALLEY AND CANYON TOOL WHEN USING A WIND DEVICE

SCOPE TRACKING CORRECTION CALCULATOR

App instructional Videos

Range Card

Loading Stages from QR Code

Multi mode / PRS

Mover Tool

Tripod Tool

Measuring animals or Ranging with Reticle

Accuracy and Sensitivity

Circular Error Probable

App instructional Videos

Build a Rifle Profile

Measure Sight Height

Truing BC

Settings Gear

Range Card

Measuring animals or Ranging with Reticle

Mover Tool

Tripod Tool

Accuracy and Sensitivity

Circular Error Probable

Scope Correction factor

How to average your wind

PRS MUlti Target

Sharing Lanes and Stages in PRS

Relative wind setting PRS

Connection rangefinders

Setting PRS Stages

App Training videos

Overview of the App

Mil GPS Connected for tracking

Initial Set up

Connection to wind meters and devices

iOS update for tracking when using the Eagle Ballistics app

Gyroscopic stability and spin rates

New PRS HUD update

Wind Zero

Zero angle

Multiple truing range /Mach

Connecting Calypso wind reader

Subscriptions

Connecting a rangefinder

Revic rangefinder

Dropping a pin for hunting

Zero Height and Offset

Tools and tips for scope correction factor

Muzzle Velocity and Ballistic Coefficient Truing Tool

Instructions

Sensitivity Tool

Range Card

Range

Wind

Detailed