Manners LRH-TK vs McMillan Mountain Tracker LR, which for a backpack 7 PRC?

[DroptineNW]

Honestly I was in same predicament but then I started playing around with xlr chassis and built one on an element 4.0 magnesium. Absolutely love it.
Needless to say I would build a rifle on manners and McMillan at some point also.