Brit Proofs.

Does any one have a Carbine with Brit Proofs ? Found on the barrel, receiver and bolt. I have two but am researching the subject so any info at all will be appreciated. Thanks, Mike

Even though you already know about mine Mike, I will get the ball rolling with replys.

Here is one of the ones in my family



and on it are these markings.



Its another Saginaw SG, 5848xxx

I'm keen to see any others

Jester and Alex. I really need to find out quick what 3640 BAR means. Do you think anyone on IMAS would know ?. Here's a pic of both of mine together. NP means Nitro Proof House and BNP means Birmingham Nitro Proof House. The two houses merged together as a result of the Proof House Act, about 1955. See the change from TONS to this 3640 BAR stuff. I think it maybe something to do with barrel pressure and a move from Imperial to Metric. Any help appreciated. Thanks, Mike.

Hi Mike, here is some helpful info, kindly supplied by my awesome fiance/research expert.

http://www.basc.org.uk/media/100_proof.pdf

This is an important piece of the info in the link, as it explains why conversions to prove the association between the two figures don't work.

In 1989, all proof data was marked in metric using the bar as the unit of measurement. the use of kilograms per square centimeter was dropped. Under this system, 850 bar represented standard proof, with 1200 bar being special or magnum. While it is possible to use mathematical factor to convert one pressure unit to another, this conversion is only valid if the two sets of values have been arrived at using the same pressure measuring system. For example, the 1954 Rules of Proof use the Lead Crusher Radial system. This measured pressure units in units of tons per square inch.

Hope this helps.

Alex

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A few marking on a Winchester M1, I think it was refurbished during korea but never issued.

Some nice photos, do you have any history on how your Carbine came to be in NZ?
It's an intriguing part of the research we are doing, trying to find how all these Brut Proofed marked Carbines came to be in NZ.