Just get a 6.5x55 in a T3 and be done with it. That's what I did. Twice.
I did it only once, but I am sold on it. Just having a difficult time finding a load that will shoot over an inch at a hundred. Last time out, five different loads with different powders and bullets yielded five groups as small as 0.56 to 0.75. Gotta hate results like that from a hunting rifle using hunting bullets.