Well, I was visiting family and decided to use the lathe in the shop to save myself $60. Ten minutes later I had converted my stock Omega plug into a 25 ACP plug. I've been too cheap to get another conversion for my second Omega, so when I carried both guns last year I'd have to carry both primer types. I didn't have an ACP case with me to test so it came out a little tight, next visit I'll take off a few more thousandths.