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. Buffalo Bore uses a flash suppressed powder so you won't become blinded by your own gunfire in the likely event you drop the hammer in a low-light defensive situation. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.