CCI's ammunition is great for sports from small game hunting to casual plinking. CCI combined rimfire priming compound with select propellants so you get very little residue. Features: - Bullet Type: Total Metal Jacket - Muzzle Energy: 312 ft lbs - Muzzle Velocity: 1875 fps Specifications: - Caliber: 22 Winchester Magnum Rimfire - Bullet Weight: 40 GR - Rounds/box: 50 Rounds Per Box, 40 Boxes Per Case