Since 1928, Prvi Partizan has been producing custom ammunition in Serbia for competition, indoor ranges and big game hunting. Blank loads were designed with for training purposes. Blanks will not cycle in semi-automatic firearms. Use extreme caution at close range, a blank cartridge can cause injury from wadding and unburned powder. The M200 A1 blank has a longer case neck to improve feeding in semi auto style rifles. This ammunition is non-corrosive.