Description If you are a high volume shooter, this is the ammo for you. This cartridge uses a non-corrosive Berdan primer and bullets with a lead core and full bimetal jacket. The steel case has is bottled-shaped with non-projecting flange and a phosphate polymer coating.PRODUCT DETAIL:Caliber: 223 Rem Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 55 gr Muzzle Energy: 1065 ft lbs Muzzle Velocity: 2953 fps Rounds Per Box: 20 Application: Range,Match,Competition Casing Material: Steel Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.