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. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases. The 375 gr. CEB Raptor is made of brass but is designed to shed its mushrooming petals after an inch or two of penetration, those petals then continue to penetrate another 12-20 inches making four more paths of destruction, while the solid shank continues to penetrate like a solid. This is a wonderful load on Cape Buffalo or soft-skinned lion, but also on all sorts of plains game and including American moose, elk, or big bear.