A guy actually did a review between the .260 rem, 6.5 cm, and the 6.5 lapua
http://demigodllc.com/articles/6.5-s...6.5-creedmoor/
And something about calibers and their effectiveness was done by the gov't...twice.
http://www.angelfire.com/art/enchanter/pigboard.html
I really like my 6.5 cm. kinda wish I'd gotten the .260 so I could push it a bit faster....but not often.