I have been shooting the 6.5x55 Swede for several decades now. It is a chambering that I really like a lot.
My Remington 700 "Classic" in 6.5x55 is on it's 3rd barrel, so you can guess it has been shot plenty.
With this rifle, I have shot eveything from coyotes to Elk, and have not had to shoot any animal twice.
My favorite bullets have been the 125 and 140 Partitions, but I like the way the 130 Scirocco works as well.
Also have some 130 Accubonds to try. Slower powders have always worked best for me in the Swede.
That being said, my powder of choice with the 120/125 weight bullets has been a surplus powder acquired
from Higginson's in some quantity years ago It was designated as AMS-47-SB Lot 10. It is a slightly slower
W760, and is a true spherical, so it is easy to accurately throw from a powder measure.
If I was looking for an accurate, out of the box 6.5x55 today, I would have to buy the Tikka, as much as
I dislike these rifles.

D.