For practice, target shooting and training exercises, UMC centerfire rifle ammunition is loaded with metal case or jacketed hollow point bullets in six popular military linked calibers. All UMC rifle loadings are ideal for high volume shooting. SPECIFICATIONS: Mfg Item Num: L223R3 Category: AMMO CENTERFIRE Caliber :223 Remington Bullet Type :Metal Case Bullet Weight :55 GR Muzzle Energy :1282 ft lbs Muzzle Velocity :3240 fps Rounds/box :20 Rounds Per Box