We have talked of paint, florescent orange, white? etc. or a tough thin paper that can be disposed of after each shoot, just something easy to maintain and see the off shots, I believe with the long range shooting we will need as large of palate as possible like the 10 ft. x 10 ft backing, because at 400yds., 600yds, and 800 yds. there will be a few shots fired with calculated ball size x powder load x distance = close to target yet perhaps not a bullseye, although that is the goal. If we could hit the bullseye 1st time every time, I wouldn't be doing this, I was an expert marksman at one time in my life, now I have trouble reading the magazines, so what was once easy, is a challenge now, yet I still love shooting, and long range does it for me. I just don't think we are good enough to put up a 2 x 2 plywood and start hitting it at long range without some walk in, like hitting the 10x10 sheets somewhere and seeing where the ball went even tho it might be 4 ft off center and 4 ft. off sides, then we know what we are doing anyway, I want to hit something i can see, maybe i should use the side of the barn, HA HA, best wishes, ray