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. Series Fort Defense Caliber 38 Special Application Home Defense Bullet Type Solid Copper Spun Bullet Weight 81 gr Muzzle Energy 333 ft lbs Boxes Per Case 25 Rounds Per Box 20 Casing Material Brass Muzzle Velocity 1362 fps Unit Of Measure box