I use rug with pellet guns but not with slingshots, and I shoot at the edges.curious - anybody tried a piece of rug ? I learned I can't attach it to the back of my catchbox, but if I keep it a few inches from the back, it has room to recoil & doesn't allow the shot to come forward. I'm not sure how long it will hold up though ... let me know if anybody has any negative experiences with using rug material ... thx !
You cut a bunch of strips of rug, wide as your catch box and a few inches deep, stack them between a couple of 2x4s, and use all thread and nuts to compress them. It catches pellets well and you can unbolt and recover if you want but I don't usually bother.