My W J Jeffery is a 3' chambered gun proofed for 1 1/2 oz. of shot.
My apologies for the quality of the photo from my phone.
The serial number is 35560.
The Birmingham proof House website indicates that the Proof tests of 1925, 1954 and 1989 are equivalent to each other. The 3" proof test of the time was I believe 3 1/2 tons per square inch for a charge of 1 1/2 oz of shot.
From the earlier thread about out of proof British shotguns it appears that this might be translated into Superior Proof in transducer values.
Am I correct?
Can I use American Magnum cartridges in this gun?
Incidentally, although the gun is marked 3" and indeed does have 3' chambers it is only marked 12 over c in the diamond and not LC!
I would be grateful for any other info you experts can glean from the proof marks!
Thanks very much!
All the best
Skeeterbd
