Does anyone know why the big difference in pellet count for test pattering between the SBE II and the SuperNova - On the Nitro website the SBE II shows 280-320 whereas the SN only shows 230-270 - I have the SN and was hoping some modification would get me in to the higher pellet count - i am currently in the high 230s with just the Rhino .660 choke with not other modifications