Keith, you bring up a very valid point. I can only speak about L.C. Smiths made in Fulton, N.Y. There is no material for bore sizes of the 10 and 12 gauge guns made in Syracuse, N.Y. (also a few 8 gauge guns that are not listed in catalogs)
Bore sizes of Hunter Arms, Fulton, N.Y.
10 gauge. .775 chambers .855"x841*
12 ga. 729-732 (I have measured a few of my hammer guns at .726)
chamber .809"x795"*
16 ga. pre-1939 .650 chambers .745"x732"*
16 ga. post 1939 .662 chambers same as above
20 ga. .615 chambers .698"x685"*
.410 .410 chambers .4765"x461*
The taper for the forcing cone was 1 7/8" in 12 1/2" in all gauges.
The 10 gauge was always 2 7/8" unless ordered different
12 gauge was always 2 3/4" unless ordered different
16 ga. was 2 9/16" until around late 1939 after this it was 2 3/4" unless ordered different. (there are a few early 16's with 3" chambers marked on barrel flats.
20 gauge was 2 1/2" until the early 1930's after this 2 3/4"
.410 early ones were 2 1/2" then 3" later.
It would be nice if other chamber and bore sizes were published here.
Last edited by JDW; 02/02/14 03:37 PM.
