For western mountain hunting, lots of hiking, definitely the ultimate sling here too. May not use it for shooting however, or if I have gun bearer. I shoot off pack if possible.
For Midwest deer in timber or in a stand I always have a sling as an aid to shooting , when a pack or bipod on the ground aren’t an option. Yo me any sling set right to wrap your arm is fine. Intend to use leather then.