I recently purchased a SBE II as well. I spent alot of time on the forums to find out about porting, chokes, cleaning and the problems people are having. After immediate mods to the gun...porting and forcing cone by Rhino, I went to the range with a few boxes of the 3.5, 3's and 2 3/4 for chokes patterns. First two shots were 3.5, the next were light and it works fine. I even loaded it up to fire rapid succession shots, and no problems. I did take time to break it down to make sure it was well cleaned and lubed. Try it first and see if you need to spend the money of the heavy loads.