I recently scrapped a rifle for this very reason. Anyone who follows my posts on refurbishing old rifles knows that I do not give up easily. But not even my ingenuity has found a solution for deep pitting in a chamber. And even if the cases can be extracted, but they have little pimples where the brass has been forced into the hollows, as it was with my rifle, then you know that resizing those cases will be a recipe for disaster, and I must sadly agree with Peter - it sounds like scrap.
---------- Post added at 08:48 PM ---------- Previous post was at 08:47 PM ----------
Scrap