I recently purchased a brand new Savage 212 bolt action shotgun, fully rifled with a Nikon 3-9x scope on it from Dick's for $499. That shoots rem Accu Tip 12 gauge slugs within 1" groups at 100 yrds out of the box.

My old Remington 870 smoothbore shot Federal Slugger (non-sabot) slugs just as well believe it or not for a smoothbore with even a full or modied choke! That gun drove TACKS for a smoothbore!