Quote Originally Posted by granite1 View Post
I think i read something somewhere about moly attracting moisture? and reacting causticaly with it?
Correct. It can etch barrel steel, which is why I stopped using it. I didn't know it would also do the same to copper.

By the way, I tumbled these with some ceramic beads and then coated with Titanium Nitride and 90% of them look quite good. I am going to try shooting a few with a known good load for this bullet. If they shoot well, the ones that have clearly visible pits in them will be saved for fouling shots and the other ones will be used up on steel at 1K.