Frontier Cartridge features Hornady bullets in 223 Rem and 5.56 NATO. Applications range from plinking, target shooting and hunting to law enforcement training and self-defense. Product Features Consistency in Every Cartridge Rounds for All Applications Military Grade Product Specifications Caliber: 5.56 NATO Bullet Weight: 55 gr Bullet Type: Frontier Hollow Point Match Muzzle Velocity: 3240 fps Muzzle Energy: 1282 ft/lb Quantity: 20 Rounds per Box