Critical defense was developed to provide the best performance for personal protection situations and is the ultimate choice for short-barreled, concealed-carry style firearms.The patented ftx bullet with its flex tip expands reliably and resists the clogging and inconsistency that often plague other hollow points when fired through heavy clothing.The nickel-plated cases resist corrosion and simplify chamber checks in low light.Optimized propellants burn quickly to reduce recoil and limit muzzle flash, preserving night vision.Critical defense performs especially well in close-quarters and short-range situations.Caliber: 223 RemBullet Type: Flex Tip eXpanding (FTX)Bullet Weight: 55 grMuzzle Energy: 1282 ft lbsMuzzle Velocity: 3240 fpsRounds Per Box: 20Boxes Per Case: 10Application: Home DefenseCasing Material: Nickel-Plated BrassHazair: Yes