T-bill, I concur w/all of the above. I have wanted a 219 Zipper for at least 45 years in an SS but the case forming, dies ect. are a little over he top and I would think a 225 Win. would be worse yet as I need a few hundred cases for gophers in MT. I have settled on the Swift since 1972 and have never been w/o one since then. If your 223 bbl. is long enough I would have it chambered to the Swift. However I would think the best thing to do is get a long Handi factory bbl. in 22-250 (yeah I know it's very boring but...) It would be much simpler, cheaper and you could form your own cases from any .473: base dia. cases around (except the BR's). which will be at least as much fun as working w/the 30 WCF's!-NOT. Anyway my 2-C Have fun- Muddy