Well, got a new odd thing. Had a case with a pierced primer and when I went to decap it, it punched through the anvil (or maybe there wasn't an anvil???) and through the hole... Then it was stuck in the shell holder.
So I ended up setting it in a vise and drilled into the primer through the hole in the shell holder and got it to climb the drill bit... Should have taken a pic, it just stretched the cup out enough that I couldn't get the case off the shell holder.