I searched around and found one part answer to my question. I was thinking of making a bullet trap in my back yard and was looking to see if anyone else has . I had read other posts about using rubber mulch/ ground up tires in them to stop the bullets. I would be shooting only pistol caliber ammo into it, rifle I will still use an earth backstop. I came across one post (can't remember members name) saying they stoped .45 with 18" of rubber. My main question is has anyone made one and how much rubber did you use as far as how deep. I will be shooting 9mm, .357, .40, .45. I am just in the research faze right now but and I want to be able to recover the shot bullets easier than digging through the dirt. I don't really want to go through making a metal trap. It would cost more than I would prefer to spend and take too long, but that also depends on if the rubber is feasible for stoping the rounds. I do have plenty of land and distance to neighbors s I don't need to get into debates about that. Thanks.