Prior to the Proof House revisions of 1925, 2 1/2" chambers were (usually) marked 1 1/8 oz. and 2 3/4" chambers marked 1 1/4 oz.

Any almost 100 year old gun deserves a good check and clean, with a bore scope examination and wall thickness measurements. If the end of chamber wall thickness is > than about .100", if the chambers were lengthened, though out of proof, it doesn't matter if using loads for which the gun was designed.

OK - just saw the DOM post. There was no load indication prior to the 1896 revisions.

Last edited by Drew Hause; 07/09/20 12:57 PM. Reason: correction
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