I hunt in a few areas that require shotgun slugs, these are usually populated areas and the feeling is that a rifle is too dangerous. I set up the second set of barrels for use in these areas, and it is so much more fun to hunt with this gun than some old single barrel shotgun. The shotgun barrels have 3 leaf express sights and day/night front sight along with German pivot mounts.
I have never tried ordinary shot shells, I suspect the patterns would look like a doughnut.