Posted by Tom Archer on July 21, 2012, 10:53 am, in reply to "2 5/8 Chamber in 12ga"
69.40.2.18
All the research we've done to date, as well as surviving factory engineering drawings we've studied, show the standard LC Smith 12-bore chamber length to be 2 3/4"; and that only those guns special ordered with different chamber lengths (2 5/8", 3", etc as per Drew's example) were marked/stamped to indicate they had other than a 2 3/4" chamber. Yours could certainly be less than 2 3/4" and not marked; but based on what we've learned to date, I personally would be forced to get a second option just for the curiosity factor.
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