RE: scope on turkey gun?
I started out at about 15 yards. You can get a good feel where your pattern is going at that range since it is so tight and adjust your scope accordingly. I then moved progressively further to make sure the center of my pattern was still around the bullseye. I ended up at 40 yards to see how many hits I would get in a 10 inch circle.
I have a Simmons 2X scope on my Mossberg 835 and love it!!