Initial velocity of the bullets fired from this magazine is much too high. The 12.7x108mm fired from the Gepard series rifles should be closer to 860 m/s, at most in the low 900 m/s range. 1114 m/s is much too fast for this cartridge and would be impossible without resorting to another more powerful cartridge, or substantial changes such as flechette rounds.
Code:
class 5Rnd_127x108_Mag : CA_Magazine {
scope = public; displayName = "$STR_A3_CfgMagazines_5Rnd_127x108_Mag0"; picture = "\A3\Weapons_F\Data\UI\M_5rnd_127x108_CA.paa"; count = 5; ammo = "B_127x108_Ball"; initSpeed = 1114; sound[] = {"A3\sounds_f\dummysound", 31.6228, 1, 1600}; reloadMagazineSound[] = {"A3\sounds_f\dummysound", 0.01, 1, 10}; descriptionShort = "$STR_A3_CfgMagazines_5Rnd_127x108_Mag1"; mass = 10;
};