I wouldn't do it. I use them for targets with my archery, my arrows go a couple feet in, especially with broadheads. Would be worse shooting bullets through that. Better idea would be to dig a long sloping hole angling down, and shoot from an elevated platform or hill so the rounds go into the ground. I sight mine in at 100 yards with the target facing a hill or down into a ravine, that hunters education course they make you take where they explain a 22lr can travel over a mile makes me think about how far that bullet can actually go. Years ago had a site knocked crooked on a rifle, didn't see it and the rifle shot completely over the target with a tracer round. That one instance made me reevaluate my gun range locations, luckily it was a tracer and we saw it. It's better to be completely sure then have to someone's family sue you for everything you own the way I see it.