.223 Remington - 55 Grain Full Metal Jacket - Brass Cased - Boxer Primed - Non-Corrosive - Reloadable - New Lake City/Winchester Contract Production - Muzzle Velocity: 3240 fps - Muzzle Energy: 1282 ft/lbs - Uses: Target Shooting Training and Plinking - 1000 rounds per box. Two boxes per case.