RE: Need gun selection help, here's why.
Ok, I am going to throw you all for a loop and say get the NEF Pardner 20ga with screw in choke tubes. Drill and tap the barrel, put on a red dot or scope, get an Indian Creek .555 or Pure Gold .555, and shoot Nitro #7's.
You should be able to get about 200 pellets in a 10" circle with that combo for around $400 total.