SB Trap Bore and Choke Questions
 

I have a SBT with a .737 bore and choke of .030 (light full).

Did Parker overbore some of their SBTs?

It would be interesting to know what others have in terms of bore and choke measurements.

Parker did overbore some singles, some as big as .740.

ALL Parker bores were honed after boring at the factory.





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Overbore
 

Most, but not all. That's the reason for the question.

No entirely correct.
Plenty of Parker guns were overbored when built. Especially prior to 1900, I have measured some 12g. barrels with bore diameter creeping up into the 10g. range and the barrels were completely original. On the Super Fox overboring was one of the keys to its long range performance.

But yes, bores can be honed out after the fact to clean up pitting or damage, which can increase the bore diameter slightly. But just because a bore is oversized, does not mean that it must have been messed with after the fact.

My 1918 SC and 1934 SC both had standard bores with .040" choke constrictions

Overbore
 

Thank you Drew. That is the kind of information I was looking for. Actual bore measurements of SBTs to try to understand how many might be overbored.

Just trying to understand if it might have been something Parker did as a standard offering.

And thank you Harry for stating the obvious.