I haven' t gotten a shotgun yet, but when I get it, I know I have to pattern it. This is where the problem is. The range where I shoot only has a 20, 50 and 100 yard range. I know most people pattern their guns out to around 40 yards. If the gun patterns good at around 20 yards, is there any way to predict how the patterns would be at 40 yards, or even 35 yards? Thanks in advance for any help!