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 load features a JHP bullet that does considerably more terminal damage than the original round nose bullet. The expanding/mushrooming nose also ensures massive terminal damage in deer or medium hog/bear sized animals, while limiting penetration because of the expanding bullet and doing all that extra damage to living tissues. This is simply an enormous improvement over the original 45 Winchester Magnum ammunition. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.