Pse_guy Just like different shells pattern diff. so will different chokes. In other words there is no one good choke, what fires well in Full may fire bad in extra full . Get a couple choke tubes and different shells and see what works best. As far as slugs I use a fully rifled barrel and a rifled choke tube in another, although on one box of slugs it says if you don' t have a rifled choke tube to use either cylinder or improved cylinder. You do not want a restricting choke with slugs.You might also get a decent pattern out of the imp. cylinder with Buckshot so you could use both.