Well, I got a regular Remington Full choke to try with 3 1/2" Federal 00 Buck Shot. I can't get it to group together. At 40 yards or so. Maybe 30 it hits but is a huge group. Like as in 20-30" group. At 20-25 yards or so it grouped together but was like a ring. It was hollow in the middle where I aimed. Nothing hit there and it was like a ring around it. What choke should I try or what's the deal here? What should I try next?