He seems like a really great guy. I'll have to relocate if I want a range like that. It's flatter than a pancake around here. Mine is a big three sided box made out of 4x4s, lined with concrete and filled full of sand. It's about 12 feet across. Took some time to build, but I feel confident I won't be hitting my neighbors.
Well at least you live in an area where you can have one. If I where to try this where I live they'd take me straight to jail. LOL
Actually I have a few pellet guns that I use in my backyard. One's a Air Arms Pro Sport which is a pretty nice Springer Rifle.