my wife uses an around-the barrel and around-the-butt sling on her 8-pound, 12-ounce Lyman Trade Rifle
kind of ugly, not pc, so far as I know, but wow - talk about handy.
two seasons ago, she shot 2 deer within half an hour or so of one another. naturally i was drafted to help drag them out. with a shoulder-style drag rope harness and her rifle slung on my back, I was able to carry my slingless rifle and some of her extra gear in my hands - a real time and effort-saver
unfortunately, the sling is so thick, even if i wanted to use it, it would completely obscure my short primitive sights