Fort Scott Munitions 45 Long Colt TUI ammo is a match grade handgun bullet with a Tumble Upon Impact action that exceeds the performance of a standard expanding bullet for decisive terminal impact. Engineered to create a dynamic wound cavity the unique patented design of our Tumble Upon Impact ammunition provides superior performance.Tumble Upon Impact TUI 45LongColt 225gr Solid Copper Spun 20 Per Box