I have an old Birmingham proofed W Richards whose bores were proofed @ 14 (693"). Bores now measure just below 13 (.710"). As it was built prior to the "Tween" sizes being marked it may well have been built closer to a 13 than a 14.
This gun is cylinder bore in both barrels but obviously with even an IC choke an unworn dime would not enter thus showing it to have "FULL" chokes. I will not use the term Dumb or Stupid if that makes everyone happy. I will just say that depending on the dime "Trick" to determine choke shows a total "Lack of Intelligence" regarding bores & chokes. I forget the exact measurement of the bores but it may not accept a dime as is with the cylinder bores haven't checked it as I measured it & determined it was cylinder. Furthermore it never had choke as it was made during the era it would have been marked "Not For Ball" if it had been choked & it carries no such mark.
