In that my name has been mentioned, I'll cautiously, throw out my thoughts. I generally don't find the pin to be worn, the hook is. Because the pin is generally harder than the hook. Manny pins are case hardened in place, so most wear will occur on th hook. As to repair, it depend on the gun and the design. When a pin is removable, like a Purdey, and on a gun of this caliber, you probably should make a new oversize pin, engrave and harden it. On the vast majority of guns, removal of the pin and making any oversize pin with reengaving, etc is complicated. Generally replacing a pin means you will have to enlarge by reaming the hole in the action. And then the pin should be rehardened, which means rehardening the entire action I would think. In my experience, most lumps are of mild steel and can be welded up, the hook bored in proper location but still slightly forward to allow for file fitting, and this can be done without effecting the braze joint or rib solder. Properly done with a good weld this can show no signs of repair. Wit all this, the barrels should still be blacked down to the face of the action, as many times the action has moved a bit too. As was previously stated, there is more than one way to get the skin off the cat.
