Caliber: .223 RemingtonBullet Weight: 55 grainBullet Style: SinterFire (lead-free)Muzzle Velocity: 3,100 FPSMuzzle Energy: 1,173 ft.-lbs.Case Type: BrassPrimer Type: Boxer, reloadableCorrosive: NoAmmunition 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 ffl@firearmsdepot.com 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 ffl@firearmsdepot.com 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