The shotgun is so over-rated.
There's no flashider or suppressor available for it (or ever will be) that's worth a hoot. There are .22lr conversion units for the 223 autos, making them a lot more versatile, while saving you a ton of money when you are practicing speed work. Nobody has to hit running rabbits or flying birds. That stuff is all just "I want to do it" sort of thing. All hunting (in the US, at least) is for sport. When you look at the disadvantages for the deadly end, vs these "sport" advantages, the shotgun loses out.