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 Barnes Tipped TSX features a 100-percent copper body with rings cut into the shank. A polymer tip boosts the ballistic coefficient, improves long-range ballistics and provides fast expansion. The four razor sharp cutting petals double the bullet diameter making delivering "dead right there" performance.