BrutaTralb AmmoDrain will drain ammo only from the part it is hitting, While ExplosiveAmmoDrain will drain ammo in a set radius. Also, never used 'Feedback' before, but if its meant to ammodrain itself, make sure you have
Type = AmmoDrain
AmmoType = battery
Amount = 1000
Filter
[
Friendlies = true
]
Otherwise, Could you explain the function of it so I can better understand