At the moment I too seem to be the only backstop miner out here .
I cheat a little my employer sends me to replace the target backer boards ,I've built some trap boxes that amount to 8" of scrap wood and a piece of 1/8 or 3/16 steel . It stops all of the pistol stuff at the 30 yd line except that guy with the 460 and 500 S&W and the copper slugs. Nets me about 30-40 lbs per month. I sort into cast,jacketed,and 22s. Best part ? I'm paid to do it.