I am building a shooting range on my property this spring. I am haveing a load of dirt brought in to build a mound to shoot into. I am also going to build a frame to hold a backdrop for a place to tack targets on. I am looking at horse trailer matting. This is very dense rubber, about an inch thick. I think it will work great to tack targets on and should take quite a few rounds before needing replaced. My question is this, should I have any concern about bullets bouncing off? We will be shooting 22, 9 and 40. 20 to 100 yards.