No, I'm not the range police. Are you? I merely addressed the possible issue of safety behind the targets for his benefit, not mine! Just as Koda94 has done! Neither of us criticized him. (I retired in 2010 after 36 years as a government attorney.) I wanted to point out the potential liability risks unless he had a "backstop." I confess that I failed to compliment the OP on his target set-up, i.e., cardboard on wooden stakes in tires, a good approach on private land.