I use an Extra Full turkey choke from Carlsons and shoot Federal Premiums that use the flight control wad and 1 7/8 oz of No. 6's at 1300 fps. I don't use a ported choke, they can make some of the wads act funny, and grab a couple boxes and pattern them as Rodger says. When you are buying a choke for the SA, the package will say use with Winchester/Weatherby/Mossberg, that's the one you want. If you have one of the threat response models, they use beretta's mobil choke system.