Found a few boxes of UMC in the back of the storage unit. They appear to have oxidized a bit. The bullets themselves are clean and un-tarnished. The casings are mostly clean too, it's just this black mess around the backside. What do you make of it? Would you try to clean it up, or toss it?
(Sorry for the cell phone pics, it's all I got at the moment!)
(Sorry for the cell phone pics, it's all I got at the moment!)