7.5lbs. should make for an ideal balanced package, but we're talking mountains, and mountains means ultralight to some.
Been reading some Jack O. lately, Jack was old school and personified practicality, gotta love the .270...
He died in '78 before the age of "edge" and "poundr" innovation, but me thinks he would have embraced the accuracy, and featherweight technology these things offer.
Would he opt to carry 6.5lbs rather then 7.5 in the really high country? Heck yeah, I think so, but we'll never know.
