Dubz 'I have an article from.. I don't remember which magazine it is from, but anyway the man that wrote called comp-n- choke who also makes Kick's and told him to choke it down to a kick's gobblin thunder 680 and shoot winchester supreme hi-velocity number 5 in 3.5. I still shooting the utilmag ported choke. I have also bought some number 4 shot winchester hi- velocity that I am going to shoot and see the results. you should try to put a minimum of 100 pellets in a ten inch circlestarting at 20 yards, move back in 5 yard increments until you cannot achieve this, then you know your maximum shooting distance. Theguy in the article also stated a 5 carries 1/3 more downrange energy than a 6 and if you can get a 4 to hold to this 100 pellet in a ten in circle at 35-40 yards all the better. Yes it will cost some bucks buying diffrent shells and chokes,but it is well worth it in the end. You guys could always have rhino do it for you. They quoted me $315 to fully work my gun and pattern it. To much for me. I am anxious to see how it shoots the number 4 shot. I'll get the issue number of the magazine and post the name of it tommorrow. Good luck.