Hi all, I need a little help, I have a savage model 12 currently chambered in 243 win, and i looking to rebarrel the rifle mainly because i have two other 243's and now i wanna play a little bit. Ive been looking at shilen replacement barrels and was wondering can I use a barrel chambered for 220 swift with the short action receiver that I have? Ive heard the they consider the 220 swift a long action cartridge, Is this true. Now im not worried about using the magazine in the rifle single feed is fine being that im gonna use this mainly for groundhogs around the farm. Thanks for the help.