I tried something similar once, but I was only 12 and never tried it again. I used a BB gun to shoot the bottom of a 22LR that I burrie in the ground, it worked great so then I got one of dad's 12 guage shells and that ended that idea forever. I stood back and when the BB hit, the buckshot souldn't go anywhere but the shell came back and hit me right in the middle of the forhead, dang that hurt, but not near as much as after dad got home and asked me what I had been up to. I told him nothing so we went in the bathroom in fron of the mirror, dang, you could read just what the letters on the bottom of the shell said, had the imprint of a shotgun shell on my forehead and the imprint of dad's hand on my backside. I told him I didn't need the beatin, I wasn't ever gonna do that again.