As stated in previous post, just got my M1 super 90. See on some places where Benelli can tell when made, etc... I cannot find a way to ask my serial number is M399307. Also, I only have what came with the gun. How can I tell what choke, and how many rounds I can load in this? Sorry for such a juvenile newbie question, but I have been a handgun guy for a long time and very new to shotguns. Thanks!!