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. Loaded with the Barnes all copper XP bullet, this load delivers extreme penetration and expansion while having near 100% bullet weight retention. These bullets combined with Buffalo Bore's high performance components make an excellent load for hunting elk, moose, and large bears. This is one of the most powerful handgun cartridges available today from a manufacturer known for getting the most performance out of every caliber.