OP in post number 7 says the primer pierced one time. Is that amount of erosion consistent with that? Along with the firing pin hole being badly eroded also along the rim edge and whole face.I have had pierced primers that did no damage like that. It seems to me the damage is too severe for a one time thing with no other damage.

Exactly, Dan. Old, corrosive primer residue, not cleaned, is like cancer to steel.

Thank you Edgar, never thought of that. It sat for a while eating away at it.

Dean, that’s what happened. The blowback blew a piece of the stock off.
The stock was repaired but I do t have enough knowledge about the hammer and workings of doubles to know what’s ok to live with and what needs to be addressed.

This gun sat for a very long time, I received from an old friend who passed away about 15 years ago from old age. It sat under his stairs for many years. And It hasn’t been shot for about 8 years but I want to get it looked at and assessed by someone who knows, so thanks for everything you fellas are adding.

It sure looks like it happened a lot more than once.




.

Your probably right about it happening more than once but most of that I would agree is from corrosion sitting with a shell in place for a very long time.

I admit that's the worst erosion I have ever seen. However we would still like to see the face of the firing pin.

The best I have of that is in post #14 above. Thanks.

Thanks, I see it. I see it, but I don't understand it. I think, as you do, that a shell sat in the chamber for a long time, probably with some help from water or other corrosive. Personally, I would be shooting that gun with no repairs. It's a shotgun, not a high power rifle.