jwall,
There was no offense taken, nor did I intepret your statement as putting down 6.5's....In fact while typing my post about the higher operating pressures I was actually thinking about the 30-30 Win vs the 30 Remington AR where it is possible to get 300fps more from the 30RemAR with its smaller capacity case than the 30-30 with its larger capacity albeit lower pressure case with the same 160gr bullet.
As far as the 270/6.5 comparisons....what it really all comes down to for me is the "different" factor. I've owned a few 270's in the past, and so have alot of my buddies. I like the 6.5 because its the "oddball" at the range. For my use, the differences are slight enough not to have to worry about them.
Good shootin'
johnny
