I have heard the same thing..in fact a friend's 6.5 AR10 was blowing primers on the Hornady factory ammo.
I have another friend who just built up a lightweight 20" 243 for hunting.
My AR10 is a lightweight 308, Wilson Combat,my 6.5 will be a precision bolt gun.
Re read your initial post..
I would look hard at the 7mm08, I think you can get away with a slightly shorter barrel which is good if you want to hunt, especially with a can.
Edited by ccoker (08/10/15 09:50 AM)