I went with the 100 gr Nosler BT in my 260 to get a higher MV. The 120 was great on deer, and was better (faster) at knocking em down, but the 100 grainer works just fine and zips along at approx. 3100 fps in my short barrel. I like a MV of about 3000 fps in my deer rifles. Keeps the trajectories about the same in the various rifles and requires less thinking at crunch time.
I don't have my load books with me right now, but I would expect that the OP could get 3000 fps with the 120 gr Partition. If so, that's what I'd use instead of the 100 grainer.