I used a method involving a primed 38 Spl case and a plate of half inch thick wax. Use the empty case like a cookie cutter and the bullets are flush with the case mouth. They fly fine for eight yds, the distance across my basement in one of my married quarters. There was no real buildup of wax. The targets are paper and hung suspended from a wire, towel behind them. Just use a box for the catch. Yes, the primers back out.