Yep. They make rifled slugs for smooth bore guns. Read the box carefully so you don`t get sabot slus for rifled barrels. And yes, pretty dang accurate. I know people who hunt deer with them. And they are potent. Also fun to shoot water filled milk jugs too.
There are several options and styles out there. One I shot some of recently are Duplex 28 in .12 gauge in my 870 smooth barrel. It`s a dirty shooter but it is one BAD mama. Buy some, have fun.