Winchester USA .223 Remington 55 Grain Full Metal Jacket Brass Rifle Ammunition 20 Rounds. Specifications for Winchester USA .223 Remington 55 Grain Full Metal Jacket Brass Rifle Ammunition: Manufacturer: Winchester Caliber: 5.56mm .223 Remington Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 55 grain Cartridge Case Material: Brass Muzzle Energy: 1282 ft-lbs Application: Recreational Shooting Hunting Target Shooting Competition Included Accessories: Standard Primer Style: Centerfire Lead Free: No Gun Type: Rifle Package Contents: Winchester USA .223 Remington 55 Grain Full Metal Jacket Brass Rifle Ammunition What is Winchester USA .223 Remington 55 Grain Full Metal Jacket Brass Rifle Ammunition good for? The manufacturer thinks that it is suitable for competition target shooting hunting recreational shooting.Winchester W223K: USA RIFLE .223 Remington 55 Grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo 20 Rounds