I pretty much use a 20 exclusively these days, but do carry my first real turkey shotgun sometimes for the sake of nostalgia......a Winchester 1300 Turkey special. It's a 3 inch 12 gauge, and will still pattern better than any shotgun I've ever shot. I use a 20 because of the lighter weight guns and less recoil. However, if something happened and I had to kill a turkey........or else, I'd probably choose the 12.