I shoot a .177 pistol in my basement at a box full of cardboard and after enough shots the pellet hits lead and bounces back at me. Trying to catch them out of the air is now part of the fun.Thanks, yes I'm going to try a box full of rubber mulch. I've used concrete in the past, but the friggin pellets were bouncing back at me, so Don't do like I had, Easily could have shot myself, you know, "you'll shoot you eye out"!