Buffalo Bore loads their ammunition up to maximum SAAMI specifications, which delivers devastating performance on a wide range of game. 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. Both the Magnum and Lower Recoil versions of this ammunition are designed to kill game animals up to the 300-400 lb. class. This is a lightly constructed bullet that mushrooms violently, makes an enormous wound cavity and penetrates up to 24 inches in living game animals. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.