I have an extremely lightweight 16 gauge French gun with very thin barrels that I shoot Federal 1 ounce loads with. It was originally chambered for 2.5" shells, I extended the forcing cones and use the 2.75" Federals. I've shot about 3-4 flats through the gun with no problems.
Steve


Approach life like you do a yellow light - RUN IT! (Gail T.)