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. Borrowing technology from the highly successful X Bullet, the Barnes XPB is an all-copper pistol bullet. This bullet is sure to change the face of pistol hunting forever. The Barnes XPB pistol bullet will deliver more energy than any other bullet available for handguns. In testing, penetration has been increased up to 25% over lead-core bullets, while remaining intact to expand like no other bullet in the world.