Charlie: almost all American Gun Co. marked Crescent shotguns were manufactured prior to the introduction in 1922 of the Western Cartridge Co. 12 gauge ‘Super-X Field’ 2 3/4 inch 1 1/4 ounce 3 3/4 dram equiv. shell. The gun was designed for 1 1/4 oz. 3 dram loads. It is quite likely that the wall thickness at the end of your chambers is now inadequate, and a catastrophic rupture is possible, if not likely.
Brother, do what you want, but please do not have a child nearby when you fire one of your turkey loads.
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