I'm looking into the champion bullet trap or similar type to stop high powered airguns. I think I need it to stop up to 400 fpe as I could totally see needing to shoot the 357 bulldog into it. My question is can it be built cheaper or could I build a bigger or better one for less? I have a mig and a tig welder.... And a gas welder. Anyway asking what you guys came up with. Otherwise I am just going to buy the champion and weld some ar500 into it to make it a 9mm trap instead of just rimfire. Thanks dudes.