First, a littIe background:
I live in a rural area and currently shoot behind my house. Nothing fancy, just a wooden shooting bench in the back yard and a 100-yard target. Recently, I removed a 6-foot tall fence from around a 100' X 300' enclosure that I used to raise wolves and wolf hybrids in, and cleared out briars well over a man's head. This has opened up a new avenue for shooting. I currently have a 10' X 40' chainlink kennel in the side yard. I'm planning to remove the perimeter fencing but retain the concrete pad, and use it for a range platform. I could install a couple of shooting benches in two of the 10' X 10' sections, and hang tarps on the divider fence sections in order to keep brass from hitting adjacent shooters. The other 10' X 20' section of concrete could be the foundation for a little shed where I could work on my firearms, etc.
My request is to see pics of concrete benches on professional shooting ranges, so that I can get an idea how to build a form for the pouring of concrete. Another thought would be to use limestone, as I work in a limestone mill and can get all the stone I desire. I could fabricate it in sections, then use steel pins and epoxy to connect the sections together. One cubic foot of limestone weighs 150 pounds, so it would be something solid if I chose that route over concrete.