[4V50 Gary]

What Tom2 says. Use frangible, non-lead bullets. Your basement will have a lot of airborne lead that will require cleaning - especially if you have or plan to have children around. Basement ranges aren't anything new and Gil Hebard's Shooting Treasury had instructions on how to do it. I never did because of the airborne lead. In all fairness, when it was written, awareness of lead poisoning, other than firearm infused lead, wasn't all that high. Modernly, now that we know better, we have to take precautions to protect ourselves and our loved ones. BTW, in an earlier job-incarnation as a rangemaster my lead was a bit high and we were using outdoor ranges. I had to stop shooting for a while until it dropped to acceptable levels.