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. Technical Information Caliber: 308 Winchester Bullet Weight: 150 Grains Bullet Style: Barnes Tipped Triple-Shock X Boat Tail Case Type: Brass Ballistics Information: Muzzle Velocity: 2900 fps Muzzle Energy: 2800 ft. lbs.