Training dynamics provides fmj bullets in weights comparable to those found in fiocchi's premium defense and target cartridges to ensure performance consistency between training sessions and the real thing all while keeping training costs to a minimum.Caliber: 223 RemBullet Type: Full Metal Jacket Boat Tail (FMJBT)Bullet Weight: 55 grMuzzle Energy: 1282 ft lbsMuzzle Velocity: 3240 fpsRounds Per Box: 50Boxes Per Case: 20Application: Match,Range,TargetCasing Material: BrassHazair: Yes