A belated welcome to GBO!!
As Spanky said, I had a stub (see FAQs) done by GBO sponsor Wayne York, sent him a frame and the donor 300WSM test barrel along with a Shilen match blank, 2yrs later I got back a 26-3/8" barreled 6.5x55 rifle, shoots real good so far with the 139gr Lapua Silver Scenar, but it's only been to the range once, I have more loads to test and need to bed the forend, I get some vertical stringing as it warms up. Plan on spending about $300 for the work plus the cost of the parts, he could also rechamber and rebore a Hornet, 204 or 223 barrel if you wanted a shorter barrel, cost will be about the same. His turn around time is normally about 6-9 weeks or so, he had put it in a drawer and forgot about it, he'd told me it would be a back burner project, so I didn't rush him, if I'd have contacted him about it, he'd have done it much sooner!!
Tim
http://home.earthlink.net/~oregunsmithing/