I have a 30" Lilja #7 fluted w/a Defensive Edge Brake. It has a 270 hole.
The rifle all up, as they say, weighs in @ 12 pounds. W/a 338 hole it would be a might lighter. I don't think it would be too "whippy" in any way.
With the proper carry system there should be no problem hauling it around the mountains even for miles. The long barrels are front heavy and somewhat uncomfortable to carry w/a standard sling arrangement.
I'm kind of down on the weight of the McMillian stocks but that's just personal preference.
I may be the slowest guy on the mountain . . . . but . . . . I'm on the mountain!