Had a 270 Ruger tang safety rebarreled to 7x57 mauser with a Midway A&B (now Green Mountain brand) F54 heavy contour 7mm barrel blank, maybe 3 years ago. Used a retired machinist who's done gunsmithing on the side for over 30 years to do work. Recall day I dropped off the rifle and barrel and asked him if he'd have any problems rebarreling the Ruger. Look on his face at my question told me he was insulted by it...."no", he replied. He wasn't too happy when I told him it was an A&B barrel as he'd had a bad experience with one years before. I'd already used the A&B barrels before on a couple of other rifles that turned out to be decent shooters, so convinced him to use it.
Well, the Ruger turned out to be one of my most accurate rifles. Total cost of the barrel, installation and chambering was around $170.
You might want to visit website of Mark Skaggs, a gunsmith in Oregon. Just google Mark Skaggs, you should find him. His site will list prices for his work.
