As far as what choke to use, IMO it depends. Alot of prople may not agree with I'm going to say but you also have to consider the diameter of your shotgun barrel on the inside of the barrel. And no matter even its the same brand of shotgun its usually different with each gun when it comes form the factory. Granted I am definetly no gun expert, but I've had alot of guys whos "religion" is guns tell me that story. They aways say have the inside of your shotgun barrel mic'd to see what the inside diameter is then decide on a choke. Again alot of people probably wont agree with that but everybody has an opinon. I just dont think its right for the guy at Dick's to say that the Mossberg's coupled with the undertaker chokes throw a just as good pattern as the beneilli's. Every shotgun and its specs, even if the specs are small, are different. Again I am in no way any kind of expert but its just IMO.