TUI Features Fort Scott Munitions TUI ammo is a match grade handgun bullet designed to be reassuringly effective for self-defense. Engineered to Tumble Upon Impact and create a dynamic wound cavity the unique patented design of Fort Scott s TUI pistol ammunition penetrates targets deeply. TUI Specifications Caliber: 9mm Luger Model: TUI Bullet Weight: 125 gr Rounds Per Box: 20 Casing Material: Brass Application: Home Defense Bullet Type: Solid Copper Spun Muzzle Energy: 250 ft lbs Muzzle Velocity: 950 fps Rating: Subsonic