Champion's DuraSeal Challenge Series Ammunition targets are designed to test the most advanced shooters. These targets replicate 50 BMG or shotshell ammunition and make perfect targets to shoot with the aid of a scope. These targets are made from Champion's revolutionary DuraSeal material, a nonmetal, self-sealing product that lets bullets pass through with minimal damage. DuraSeal dramatically prolongs the life of the target and extends your shooting enjoyment. It easily handles punishment from small and large caliber rimfire or centerfire rifles and handguns while keeping its shape and begging for more. Champion's innovative DuraSeal technology is simply the most rugged and durable target material on the market today.