I agree that a tight choke shouldn't be needed. I just decided to take ALL of my chokes when I went to pattern the gun. Turns out that the X-Full and the .690 turkey choke were the only ones to give nice even patterns. At 25yds the patterns were about 20" in diameter, wich was enough for me.
I've read a fair amount about the forceing cone in the past several days, and I've been wondering about that. I'm not a huge fan of Mossberg shotguns, but I got both of mine for great prices. Since I shoot my handguns and rifles a LOT more than a shotgun, I choose to spend my money there. I'll have to talk to a couple of local smiths and see what they can do with my forceing cone. I've been thinking that the forcing cone could have a lot to do with what I'm seeing on paper, and your suggestions back that up.
Thanks again,
Mark