I'm considering putting in a 100-yd range in my backyard, which looks out over a HUGE cotton field. Had an idea the other day that I'd appreciate some feedback on: Has anyone ever used or considered using a dirt-filled dumpster for a backstop instead of a dirt berm? I will primarily be using 9mm pistol (mostly 7- to 20-yds out) and .223 AR, but may be picking up a .270 or .30-06 later on. I have some ideas on possible problems with this, but I want to see what others say before I bring them up. Any and all advice/comments gratefully accepted.