Brett, you are correct on the yardage. What I am trying to get is a 80% plus pattern at 40 yards, with 50% plus, of the pellets inside a central 15"circle.
Even if I can achieve this, will the 20 ga have enough pellets to do the job? I figure at 50% there will only be about 45 pellets in that 15" circle (assuming #6 shot). I'm sure the 12 is the way to go, but I have become recoil sensitive after a recent injury.
I will pattern my gun to find the tightest shooting combo, just have no experience trying to tighten up a pattern. thanks!!