During Covid I bought some 12 ga Federal Shells from the internet, 2 3/4" 1145 fps, 1 oz....reasoning I could shoot these from 2 1/2" chambered Damascus barrel SxS.
[Linked Image from i.imgur.com]

They were rusty - clearly somebody cleaning out their barn. Today my son tried using them in the 870 and they stuck over and over again. The ejector is tearing the rim off the cartridges. See photos. I put this down to the rust.
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

I then shot them in the Reilly hammer gun 2 1/2" chambers with extractors; they worked but still were "sticky." The kick was significant and I hesitate to use then with 130 year old wood.

What to do? Ditch them? Take a wire brush to the brass?

Baluch are not Brahui, Brahui are Baluch