Here at the house I have my own range set up, I have target boards set at 30', 25, 50, and 100 yards. At the target boards at the longer distances I have logs set behind the to catch the bullets so I can collect them at later dates so that I can recycle them and make cast bullets. My question is, what are the chances that if I do this at the one at 30' that the bullets may bounce back at me?