I have been thinking about getting a new barrel for my 12FTR, and have been leaning towards the 260 Rem. Two of the guys I shoot with have recently built 260Ai's on 700 actions, and are doing very well. I also have a couple of 6.5x55 Swedish hunting rifles that I like a bunch. I just checked to see if 6.5x55 cases would fit in my 12's bolt face, and they fit perfect. I would probably go with a 30" 1 in 8 Brux barrel. Has anybody done this 6.5x55 conversion in this rifle and if so how did it work? I see case capacities are similar ot the 260, so I think velocities would be similar. Any input would be welcomed. Lucus