ATragMX

1. Overview

1.1 AtragMx from Horus Vision

Horus ATragMX software considers atmospheric conditions, gun data, ammunition, range, speed and muzzle velocity to calculate precise aiming solutions with “come-up” results – and even accounts for Coriolis and spin drift effects. ATragMX, loaded on a handheld computer made by TDS Recon, is easy to use and lightning-fast. The Recon meets the rigorous MIL-STD-810F military standard for drops, vibration, humidity, altitude and extreme temperatures.

2. Requirement

• Advanced Ballistics module enabled

3. Usage

3.1 Opening the AtragMx

3.1.1 Interaction Menu

• Open the self interaction menu Ctrl + ⊞ Win
• Select Equipment
• Select Open AtragMx

3.1.2 Custom key

• OPTIONS / CONTROLS / CONFIGURE ADDONS / ACE3 Equipment

3.2 Example with M14 and default 7.62mm 20Rnd Mag

Start of the mission:

• Open the Range Card and check the cartridge, the zeroed distance, the rifle twist, the muzzle velocity at 15°C and the bore height.

• Open the AtragMx and the Atmsphr column, select Default and Done. [Manual]
• Open Gun the 7.62x51mm M80 in the GunList. [Manual]
• Select E (English unit) at the top right. [Manual]
• Open the Gun column, check and update the Bore, the Rifle Twist and Done.
• Select M (Metric unit) at the top right.
• Open the Gun column, check and update the Muzzle Velocity, the Zero Range and Done.
• The Muzzle Velocity Table will be automatically updated. [Manual]
• (Must be edited manually for specific cartridges according with the range card)
• Optionally, Save Gun and Done in the GunList.

In position:

• Update the Atmsphr column with the Kestrel 4500 and Done.
• Check the new Muzzle Velocity in the Gun column.
• Update the Target column (the wind arrow will also help). [1] [2] [3] [4]
• The latitude for all common maps can be found in the ACE3 Github.
• Apply the vertical and horizontal elevations on the scope.
• Control the breath and press.

3.3 Example with Truing tool

• Open the Truing Drop in the Options menu. [Manual]
• Add the actual Target Range in the SUPER column and Calc.
• Add the same Target Range in the SUB column and Calc.
• Apply the actual scope elevation in the Drop field and Calc.
• Accept the new C1, Gun column and Elev are updated.
• The Drag Coefficient Table will be automatically updated. [Manual]
• Optionally, Save Gun and Done in the GunList.

• If a new Target Range is applied in the Target column, the ballistic coefficient C1 and the elevation Elev will be automatically recalculated.

3.4 Example with overwritten zero distance

• The Default zero distance can be overwritten with the Scopes Options, the Scopes Framework or the CBA Settings System.
• In this case, the Range Card will be automatically updated, NOT the AtragMx.
• Open the AtragMx and the Atmsphr column, select Default and Done. [Manual]
• Open the Gun column, check and update the Zero Range and Done.

3.5 Example with Add New Gun in GunList

• Open the Range Card and check the bullet diameter, the bullet weight, the (bullet Class Name) and the muzzle velocities.
• Open the AtragMx and the Atmsphr column, select Default and Done. [Manual]
• Select Add New Gun in the GunList. [Manual]
• Add a New Gun Name and Open Gun.
• Select E (English unit) at the top right. [Manual]
• Open the Gun column, check and update the Bullet Weight (grains), the Bullet Diam (inches) and Done.
• Select M (Metric unit) at the top right.
• Open the Muz Vel Table in the Options menu or click on MV in the Gun column.
• Edit manually the Muzzle Velocity Table according with the Range Card and Done. [Manual]
• The C1 coefficient of the bullet can be found with the Eden Editor Config Viewer:

configfile » “CfgAmmo” » “bullet Class Name” » “ACE_ballisticCoefficients”

configfile » “CfgAmmo” » “bullet Class Name” » “ACE_dragModel”

• The AtragMx accepts only G1 ballistic coefficient.
• G7 ballistic coefficient can be converted, for example, with the online JBM Ballistics Calculators.
• Optionally, Save Gun and Done in the GunList.

Note: The ballistic coefficient can be calculated by using the 360 Degree Training Course mission as a chronograph at different distances and JBM Ballistics Calculators for example, an another ballistic software at your own convenience, or the AtragMx Truing Tool.

Example direct conversion with .408 Cheytac 305 grains G7 BC 0.279 at 2000 meters 15°C:

3.6 Adding ATragMX Presets

• ATragMX Framework

3.7 Reseting the AtragMx GunList

• Open the Eden Editor and the Extended Debug Console (Ctrl+D).
• Execute call ace_atragmx_fnc_clear_user_data (LOCAL EXEC).
• The original ACE3 GunList will be restored (all Add New Gun entries deleted).

4. Official References

• Official Manual