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: 45-70 GovBullet Type: Solid Copper SpunBullet Weight: 300 grMuzzle Energy: 2071 ft lbsMuzzle Velocity: 1763 fpsRounds Per Box: 20Boxes Per Case: 10Application: Home DefenseCasing Material: BrassHazair: Yes