American made and military grade are the hallmarks of frontier cartridge.This line of ammo gives shooters the best of both worlds.It is configured for a wide range of shooters and applications, from target/match shooting to varmint hunting.Frontier cartridge features brass cartridge cases and military grade boxer primers and propellant.Caliber: 223 RemBullet Type: Full Metal Jacket (FMJ)Bullet Weight: 55 grMuzzle Energy: 1282 ft lbsMuzzle Velocity: 3240 fpsRounds Per Box: 20Boxes Per Case: 25Application: Varmint,TargetCasing Material: BrassHazair: YesAmmunition cannot be shipped to a P.O. Box, please use a physical address during checkout. For restricted state buyers (CT, IL, NJ), please email a copy of your state's credentials, and a photo ID along your order number to [email protected] within 5 business days to avoid cancellation and refunding your order. For California, Massachusetts and New York buyers, please have your dealer email us a copy of their FFL or Ammo Vendor License along with your order number to [email protected] within 5 business days to avoid cancellation and refunding your order. Your order will not ship without us receiving this information. Thank you for your cooperation