When I first got my gun I sent it to ballistic Specialties to get the trigger lightened, forcing cone lengthened, and Barrel ported. I also told them to give me a choke they recommended to shoot the Winchester High Velocity to ounce number fives. It came back with a .650. Back then I was not into seeing what's the best I could do. I know it did well though, I don't have any the old Targets or pictures of the targets. I just trusted their judgment and I killed turkeys. I know that when I did put it on paper back then that everyone I showed it to said it was good but that was probably 16 years ago. Mine is the 26 inch Universal hunter that came drilled and tapped.