Barrett’s 50 BMG ammunition is ready for action. Encased in Barrett head-stamped brass, every cartridge is loaded with noncorrosive powder and primers as well as a 661 gr projectile using state-of-the-art machinery. Caliber: 50 BMG Bullet Type: M33 Ball Bullet Weight: 661 gr Muzzle Velocity: 2800 fps Rounds Per Box: 10 Boxes Per Case: 25 Casing Material: Brass