Originally designed for military, law enforcement and fast action pistol training. These are action targets that are unpredictable and they challenge the shooter to locate and readjust for every shot. The technologically advanced material will handle thousands of rounds from.22-.50 caliber. These durable targets are built for long life and countless hours of fun. Target Self Heals Upon Impact. They Fly, Bounce, Roll, & Run every time they are shot - Never the same Shot twice. Handles 1,000+ rounds ( Gun Ball handles 10,000+ rounds).