I was looking at a drilling at the Southern last year 12x12 over 9.3. I asked if I could go measure it and test fire the shotgun barrels.
When I took the barrels off, the German proofs were 16 gauge 65mm. Someone had opened it to 12 gauge 2 3/4".
I did not test fire it and promptly returned it.
I have a 20ga Coswell and Harrison ca 1973. Proofed at .615. Both barrels are spot on .615. the left barrel drops to 19 thou about 6" from the muzzle. It was just made that way, best I can figure.
My barrel wall thickness gauge will be at the Southern along with my bore gauge. I usually leave them in the truck but will be happy to check out a gun. I have 4 rods, so can measure 10 to .410.
John Hosford covers some his travel expenses measuring barrels and selling bore gauges. I feel like I am supporting him by not openly measuring guns.
Joe in Charlotte
