If you are hiking the high country, for multiple days looking for a potential trophy deer...anything over 9# is getting heavy, no matter the caliber!
Back in the day, when I was a much younger, x- marathoner, I would "never" even consider my Savage 6.5-284 Long Range Fluted as a high country mule deer rifle. It is simply too heavy to carry for an extended, physically demanding "high country" mule deer hunt!
If the high country, very physical hunt is not on the agenda....then anything you want to use! memtb