Decided to use one of my GH 16 ga. 0-frame Damascus guns for turkey hunting this year. It has 2 1/2" chambers with the rim cut into the chamber for brass shells rather than tapered forcing cones. Chokes are X-full x X-full and the barrels are 26". It is the heaviest 0-frame sixteen I have held.
See thread "Loads for Turkeys" for the shells I found for it