I got a welder to hook me up with a backstop that I'm going to set in front of a berm of sand. Basically the reason I want to fab up this thing is to be able to capture the bullets and so if I ever go to sell the land I won't have to contend with a big berm with 10,000 lead bullets in it. Well anyway, it's got a sheet metal backing, I think 3/8", pretty standard steel, and I was gonna bolt on 1.5 inches of plywood to that and shoot into the wood from 5-15 yards with 115 grain or so standard target practice rounds from Remington or PNR or something. 9mm. My hope is that the bullets will lodge in the wood, get way slowed down, and basically stop when they reach the metal, if they do at all, at like 100-200 fps. Then eventually I'll just unbolt the wood and toss it out. I'm obviously concerned about ricochets. My other idea is to bolt on one of those superthick horse pads - about 1/2 of solid rubber. Though I don't know how that would work re: bouncing. If the bullets lodged, I would say it is burly enough to drastically slow down the 9mm before it reaches the metal for its final stoppage. Any thoughts?