SB Trap Bore and Choke Questions

Scott Smith · 11-13-2020, 08:32 AM

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.

Bill Murphy · 11-13-2020, 08:44 AM

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

Harry Gietler · 11-19-2020, 09:24 AM

Quote:

Originally Posted by Scott Smith

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.

Most overbore in shotgun barrels is called Honing Harry

Harry Gietler · 11-19-2020, 09:27 AM

Quote:

Originally Posted by Scott Smith

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.

Most overbore in shotgun barrels is called Honing . Harry

Dean Romig · 11-19-2020, 10:02 AM

ALL Parker bores were honed after boring at the factory.

.

Scott Smith · 11-19-2020, 10:05 AM

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

B. Dudley · 11-19-2020, 10:34 AM

Quote:

Originally Posted by harry gietler

Most overbore in shotgun barrels is called Honing . Harry

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.

Drew Hause · 11-19-2020, 01:05 PM

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

Harry Gietler · 11-19-2020, 02:42 PM

Quote:

Originally Posted by Scott Smith

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.

The question is Did Parker overbore SBT gun barrels? They may have honed them at the factory as per customers wants or later on known as after market! Harry

Scott Smith · 11-19-2020, 04:01 PM

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.