It will be more than just a rechamber, H&R doesn't make a 6.5mm barrel, it will have to be a rebore or a stub, I had a 6.5x55 Ultra stub done on a Shilen Match blank by GBO sponsor Wayne York, plan on $300 plus the cost of the barrel/donor/blank, he does both, he's done a couple rebores for me, a 338-06 A-Square from a 25-06, and a 405 Winchester from a 38-55 Target, plus several rechambers, the next of which will be a 35 Whelen Improved, he's done work for a LOT of members here including the big guy himself, Graybeard!

Tim
http://home.earthlink.net/~oregunsmithing/(541)278-4177