A sling lets me keep a gun on my shoulder all the time, because nothing is worse than having the only ducks of the day try to land in the decoys when you're out picking them up and your gun is on shore. And yes, ducks do show up when you're out in the decoys because -- I believe anyway -- the ripples attract them. To guard against those ducks I sling the gun with the chamber empty and two in the magazine. I usually take the sling off in a blind, as sometimes they get tangled up. I also learned this past week that standing sunflower heads in a dove field have an uncanny ability to snag shotgun slings.