A rifled choke is different from all the common chokes. It has rifling inside which is designed to add extra spin to a slug in order to make it more accurate. As you know, rifled barrels always make shooting more accurate. There are lots of holy wars about rifled chokes. Some people think that a short-rifled choke which is just 3.5 inches long cannot add sufficient spin that can make shots more precise. Others argue that tests show improvement in the accuracy of the shots. I have tested the rifled Benelli Choke some time ago and the results were pretty interesting. They were almost the same as with the rifled Remington choke.