You will regret the sling when the game flushes, and your gun is on your shoulder instead of in your hands.
I wanted to use the Quake sling that came with my CVA for all my firearms, so I retrofitted my 1100 with slingstuds so I could keep my hands free. But I only do that walking in to my chosen hunting ground. I take it off when I get there, and stick it in my game pouch.
Other styles of sling slip on and off with a loop instead of swivels. You should be able to take a look at these starting around $10 anywhere sporting goods are sold, and online. Some people just use a length of clothesline with a slip noose at each end.
You really don't want it in the way when it's time to shoot.

what type of shot gun , pump, double barrel . pump's are easy a new magazine cap and a sling stud in the but stock and your done. a double barrel and you need to have a stud silver soldered to the barrels or find a double loop type sling that cinches around the barrels and the stock . the later is much cheaper for a double barrel .

Get a Boonie Packer Sling!

It places your gun in front of you, and you can bring it up as if it was in your hands the whole time.
Every rifle/shotgun I have has a Boonie Packer Sling on it.

Google, Boonie Packer Sling to see/purchase one.