while not very "classy looking"...I have a barrel band on my .416's...and have used the stretchy Butler Creek slings..because of the material they are made of --don't really have to worry about weather much..and they really do ride nicely on the shoulder...have used them for years on all my rifles...have tried others but keep going back to these...

Ripp

http://www.butler-creek.com/products/comfort_stretch_slings.html