I was interested in the answers to the op's question but it seems not many realize he was asking how you carry your rifle, not your binos.
Oops, to answer the right question. When hiking in in the mornings or out in the dark at night I use the Stone Glacier Quick Release on my KUIU pack until I get to were I am going to hunt, then it goes on my shoulder using the sling. I originally ordered a KUIU gun bearer but the bucket was to small for the butt of my gun.