I've been thinking about re-barreling my .270 win, which currently has an 18" barrel to a 22" barrel. How hard would it be to re-chamber it to say a .280 rem? Is it possible at all? I have a qoute from Hart barrels for a re-barrel soup to nuts $550. I looked at Shilen's web-site and it looks like they would be around $600+. Should I buy the barrel blank myself and have a gunsmith do it or have the barrel manufacturer do it? Any perference in barrels, Shilen vs. Hart vs. Lilja vs. Douglass etc. Thanks in advance.