Fort scott munitions tui ammo is a match-grade bullet made of solid copper and engineered to tumble upon impact providing devastating stopping power.While designed as precision ammo for rifle hunters, fort scott's multi-patented tui technology also makes them ideal rounds for home and self-defense or law enforcement.Caliber: 5.56x45mm NATOBullet Type: Solid Copper Spun (SCS)Bullet Weight: 55 grMuzzle Energy: 1433 ft lbsMuzzle Velocity: 3426 fpsRounds Per Box: 20Boxes Per Case: 25Application: Home DefenseCasing Material: BrassHazair: Yes