I decided to buy a new barrel for the 870 Ecpress Magnum my father gave me.Pretty much decided the 26" length vent rib Rem-choke would serve me best.Question is would the 26" Wingmaster barrel fit my gun and are they any better polished/smoother in the bore?I really dont care about the bluing on the outside.Just wondering if I can expect better patterns with it or not.Also which choke patterns best with #4 buckshot?