Hi all, I purchased a used 220 Swift and with it came a 243 super Rock chucker Barrel. I don't have any experience with this round and I can't seem to find anything on the web can anyone help? I have never formed any brass and I'm not sure how to go about it. Some people say that you can neck down a 270 or 25 odd 6 with a false shoulder but I do not know what that means. Any help would be appreciated thank you.
