I believe the fully rifled barrel is only intended for sabot rounds. I use it on a 870 that came with a 30” full choke barrel. I keep it around with 00 buck primarily for home defense and hopefully I’ll get to turkey hunt again. I don’t know that I’ll ever deer hunt with it. I deer hunt with either a 30/06 or a 45/70 govt. In Mississippi, during the primitive weapons or muzzle loading season, we can use a single shot, exposed hammer, pre 1900 patent in a .38 cal. or larger so I don’t use my muzzle loaders anymore.
Some states do not allow deer hunting with a rifle. But, at least some, states do allow rifled shotguns.