Occasionally I play with loading 2 1/2” shells but usually I just shoot longer 2 3/4” in all my short chambered guns. Tens of thousands of rounds through my early damascus barreled guns and never a problem. Seems the same mentality that says shooting smokeless in damascus guns is dangerous goes along with shooting longer hulls in short chambered guns is also dangerous. Test after test has shown it is perfectly ok to shoot longer hulls in short chambers. Oh well....