Buy Buffalo Bore Ammo 50 AE 380 Grain Hard Cast Lead Flat Nose Box of 20 Online. Buffalo Bore loads its ammunition up to maximum SAAMI specifications, which delivers devastating performance on a wide range of games. Please note that this ammunition is not intended for older guns. It is made for modern firearms only, as some of the ammunition could damage older and weaker firearms. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.