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. Product Specifications Caliber: 8.6 Blackout Bullet Weight: 285 Grain Bullet Type: Solid Copper Spun (SCS) Muzzle Velocity: 1050 fps Muzzle Energy: 698 ft-lbs Quantity: 20 Rounds per box