So this has only happened to me twice the second time just having occurred. But there have been lobby's that I go into where everything is normal for the first 5 or 10 minutes of the game and then suddenly my bullets stop working. I've even ran up to an opponent with a full clip and unloaded the entire thing point blank with no effect. During this period my melee seems to work my explosives work everything but bullets. I'm not sure if I'm alone on it but it's a pretty big letdown when I'm enjoying my game right up until it stops working. Each lobby has been full with lots of aggressive playing so I don't know if that would have something to do with it. Regardless I thought you guys should know.