What Still says: Berdans are one-time only, but if you got desperate, you could make a bushed drill sleeve and poke them for Boxer. Been thinking about trying that for fun.
As for your scratching question, Still, I have cootied a die. I got a hunk of grit somewhere, it bedded itself in the brass and put a ding in the die. Soft metal with a large bearing surface can hold a hard thing to wreck the harder metal...sho nuff.
Thank God for die grinders. Took some nit-picking work but I got rid of the cootie and the die works fine.
