Posted by Ralph Whitesell on December 21, 2007, 4:55 pm, in reply to "Re: chamber length"
The new LC Smith book- Houchins (page 389) says the 16 ga. changed from 2 9/16 to 2 3/4 in 1929 and the 20 ga. from 2 1/2 to 2 3/4 sometimes before 1936. Hope this helps. The new book has a lot !!!! of info and appears to be as close to right as damn is to swearing. RWW