Bfg hunting sling
Originally tried a cheapy Allen brand sling for a Ruger bolt action. It broke literally on first morning stalking through woods for hogs. Decided to spend little bit of extra $ on a quality name brand sling and couldn't be happier. Exceptional quality and easy slide adjustment of buckle one handed. Already been used several times including range time and has worked perfectly. All in all it does cost more than a bargain bin brand sling but for the quality you get in the product the investment is really minor.