Tried the tap and die thing, stripped it out, Tried also to drop a punch into the die and knock it out, only thing that did was screw up the expander ball. Finally, I viced the die and used a stuck screw extractor. That did the trick. I dropped in the expander from my .223 and sized a couple. They were right in spec with my speer book, so I think I came out no worse for the wear. Won't be doin that again soon.....I hope anyway!