RE: 20 gauge
Had a Wichester 1300 in 20ga. The best turkey gun I ever had! I [like a fool] sold it to help pay for an over and under I purchased. I knock down turkeys at 40yds with that gun. Shot 3" #4 copper platted shot out of that gun. Killed a lot of turkeys with that gun, but the trick was to stay away from extra full chokes. I used a standard full choke and the gun patterned like a charm.
Gselkhunter