I took some more measurements and made a mould of the chamber to better understand the shape of the forcing cone. A plug gauge of 0.685” diameter inserts 71mm into the chamber. This is the middle of the CIP length range using the minimum diameter gauge from what I see on their tables. The forcing cone length is 0.42”. Bore diameter at the end of the forcing cone is 0.632” which is less than the CIP max of 0.637 and only slightly more than the main bore diameter. I remeasured the wall thickness and the thinnest spot is on the top of the right barrel closer to the rib. Left and right barrel wall thickness are as follows:
End of chamber left=0.070”, right=0.065”
End of forcing cone left=0.85”, right=0.78”
Another 0.625” down the barrel left=0.070”, right=0.065”
It would seem to me the chambers are original, the right chamber is closer to the top of the barrel, eccentric by about 5-10 thou.
If the outside of the barrels were refinished it was well done, the barrels profile is very nice and smooth.
Does anyone have any hints on how to tell if the barrels might have been re-profiled? This gun came from Europe through an importer of surplus guns. From what I understand I can’t imagine this gun would have been worth the expense to do that kind of thing to restore. The stock looks like it was refinished and I think someone cold blued the barrels to cover some bluing wear on top of the barrels.
Thanks everyone for taking an interest.
