She came to me with a headspace issue and resulting extraction problem. A replacement chamber ring had been improperly fitted, supposedly by a well known gunsmithing firm. Those familiar with Model 12's know the ring must be absolutely dead nuts concentric/sized to the back end of the chamber, and this one was was off. Normally that's done with special piloted tooling from the muzzle end, but a NOS unfitted chamber ring and improvised setups on the lathe and mill did the trick here.
I shot her for the first time a few days ago, 42/44 on Super Sporting clays. She fed and extracted perfectly with a mix of Remington, Federal and Estate factory 7/8 ounce loads. All with modern steel base hulls that often cause problems in Model 12's. Ready to rock on!

frank
There are some small raindrops on the Winny in these pics