I have a friend that hunts with a 20 gauge shooting slugs and he swears its the best deer gun he has. He's sure killed a lot of deer with it. I do not know the kind of slugs he uses.
I have a Winchester Model 1300 20 gauge pump, but never shot slugs out of it. Perhaps I need to get a box of them to try just for fun. What choke would you use.. improved cylinder I am guessing.