Ballistics - B_50BW_Ball_F updated

[Laid3acK]

When merged this pull request will:

• update the B_50BW_Ball_F according with the Beowulf 12" Barrel Ballistics.
  (1800 ft/s: 549 m/s close with the vanilla typicalSpeed = 550;)
• update the AtragMx GunList.
• update the arifle_ARX_base_F with the arifle_Katiba_F values (same caliber and magazines).

##########################################
Ammo Class: B_50BW_Ball_F
drag model: 1
ballistic coefficient: 0.21
MaxRanges (m): [300, 300]
MuzzleVelocities (m/s): [544, 564]
Max. Velocity diff (m/s): 20.45
Max. Drop diff (cm): 0.81
Max. Tof diff (ms): 8.5
Optimal airFriction: 0.00209809

Issues :

• Primary weapon rangecard (B_65x39_Caseless_green) with the .50BW selected (class Secondary: Rifle_Base_F).
• With a sniper scope, the turrets don't work when the .50BW is selected.
• the .50BW ACE_barrelLength = 304.8; and ACE_barrelTwist = 508.0; are overwritten in-game by the Katiba ACE_barrelLength = 508.0; and the ACE_barrelTwist = 203.2;.

[Laid3acK]

This PR is only useful with the default ballistic.
i tried a quick compat with a rifle and same 0.50BW values,
the result and the bullet trajectory are good in-game according with Strelok values.
The advanced ballistics don't work with a "Secondary" weapon actually.

[jonpas]

The advanced ballistics doesn't work with a "Secondary" weapon actually.

Hmm, don't see a reason it shouldn't, so this could be added.

[Laid3acK]

I don't understand what's happening exactly.
The .50BW has the Katiba rifle twist and the bullet trajectory in game with adv. ballistics enabled is completely wrong.

[Laid3acK]

I can fix that temporarily with ACE_caliber = 4.55; instead ACE_caliber = 12.7;.
With this bullet diameter, i have exactly the same .50BW spin drift with the correct rifle twist 20".

[Laid3acK]

Confirmed in-game with ACE_caliber = 4.55;, the .50BW works as it should be now with AB enabled.
Better than nothing ?

[Laid3acK]

With the vanilla Arma 3, the arifle_ARX_base_F initSpeed = -1.125; overwrites the Secondary: Rifle_Base_F initSpeed = 0;.

The vanilla .50BW has in-game a MV 652 m/s = 10Rnd_50BW_Mag_F initSpeed = 580; x initSpeed = -1.125;.

Seems to be a BI bug, not ACE3.

[Laid3acK]

Last tests in-game with ACE_caliber = 4.55; and no dispersion, the .50BW external ballistic in-game matches with Strelok and the AtragMx. Until a BI fix, the only solution i found.