As others have stated, the 1907 sling is very hard to beat. Started out with one many years ago, and for competition, it is still one of my favorites. No warts on the USGI cotton web sling as Garandimal pointed out. They are both simple and they work, both in carry mode and as a shooting aid, when set up properly (as several previous posts demonstrate).
@hookey's Bucheimer looks identical to a couple of slings my son gave me a couple of years ago by Murray Leather Co. out of Aledo, Tx which work great as hunting slings.
View attachment 916255View attachment 916256
Set up as shown, sling length can be adjusted with one hand by simply sliding buckle up or down. I always set up with the loop forward woth either leather or cotton GI sling as opposed to the GI setup for a reason. Most of my hunting today is sitting, shooting off sticks. Dropping the loop over one leg of shooting sticks prevents sticks from sliding out from under your rifle if momentarily distracted.
View attachment 916257
When hunting or on way to or from a stand, I generally carry the rifle slung, muzzle down under left arm (I'm right handed), with left hand on forend, between the rifle and the sling. Sling is pre-adjusted to correct length to serve as a hasty sling in offhand position. If a quick shot is presented, the rifle can be quickly brought to shoulder, twisting rifle 180* w/left hand while sling remains in position to provide good support for an accurate offhand shot.
A hunting rifle is, well, just naked without a proper sling.
Regards,
hps