derma:
"I have a Remington model 700 action rifle chambered in a 222 Remington. My question is, can I change the barrel and convert it to a 6.5 SAUM? Not an experienced long range shooter here but I'm trying to get some range improvements for up to 500 yards for whitetail deer hunting. Looking to go hunt some elk as well. Please advise."
Aside from it being the wrong bolt face, as someone has already said, the .222 is moderately sought after. Not exactly a rare treat, but you might be able to get what you paid for it if its in good condition. To have someone change the bolt face and re-barrel would cost as much or more than what it would cost to buy an inexpensive rifle new in 6.5 CM. PM me.