I have a benelli sbe2 with a 28" barrel. I run an Indian creek .665 in it with apex 3 1/2" 9s. I've tried other loads as well. With this being said I don't have that great of patterns out of any load I've ran through it. With it being a 28" barrel is there a rule of thumb on tighter or more open constrictions. I think I had read somewhere on here a while back longer the barrel open the choke a little more? I may be wrong. Maybe someone can chime in