TARGETS...Type of steel and how thick? in SASS Wire Posted February 26, 2018 On 12/9/2016 at 3:19 AM, Warden Callaway said: I've found railroad plates hold up real well. I made bullet traps out of big skidster tires. There traps have a backing plate bolted to the back side. The railroad plate is suspended in front of the back plate. I figure I recover well over 50% of the lead thrown at it. I was gonna link this very video! I'm also gonna be making a full set of practice targets this way, but ordering 10" round AR500 plates (about $25 each on ebay) to hang in em. Why 10"? Aim small, miss small. Practice on small targets and the ones at a match will look huge.