Ports really dont help tame recoil. They are there more to help strip the wad. Other than weight being a factor; action type has a lot to do with felt recoil. A gas operated gun will kick the less then the inertia types (benellis) pumps, singles, and SxS/OU. How much payload and how fast the payload is traveling effects it as well. Bottom line 3" turkey loads kick and a 3.5" in the right (well wrong depending on how you look at it will absolutely stomp you. You are getting up into the 375 H&H recoil category then.