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Black powder proof / bore diameter?
#582461 10/21/20 11:46 PM
Joined: Jun 2020
Posts: 2
joekski Offline OP
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joekski
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Joined: Jun 2020
Posts: 2
Hello, thanks for looking at my post; I'm new to this so I really appreciate it.

The gun I am looking at has the following:
- black powder proof (no nitro or re-proofs); pre 1905 I think, I plan on using RST low pressure loads
- no barrel pitting
- not Damascus
- wall thickness .026 / .027
- 13/1 proof marks
- bores are .727 for both

My main question is should I be concerned with the 13/1 proof and .727 bore diameter? If I understand it correctly, 13/1 means measurement was between .719 & .728, so this shouldn't be a problem.

Any other comments are welcome.

Thanks again.
Re: Black powder proof / bore diameter?
joekski #582468 10/22/20 07:21 AM
Joined: Aug 2013
Posts: 694
Likes: 65
Atlanta, GA
Dan S. W. Offline
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Dan S. W.
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Joined: Aug 2013
Posts: 694
Likes: 65
Atlanta, GA
Originally Posted By: joekski

My main question is should I be concerned with the 13/1 proof and .727 bore diameter? If I understand it correctly, 13/1 means measurement was between .719 & .728, so this shouldn't be a problem.


At a glance, that all looks correct. I think the only issue with proof and the bore diameter is that you have a limited amount of wall thickness remaining for lapping before it is out of proof. I would just factor that into the price, personally, assuming you are in the US where proof is not required.

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