A cleaner gun? Earlier this week my bro-in law and I shot several hundred rounds of OLD (over 12 years old) 9mm ammo. I didn't reload these rounds, they were bought at a gun show. He calls me up last night after cleaning his gun to tell me how surprised he was at how clean his gun was after all the previous days shooting. He told me that it had never been that clean after shooting factory ammo. Has anyone else noticed this? I guess I haven't really paid attention. I haven't rolled my own rounds yet but will soon and will be paying extra attention to the insides of the gun afterward. Does reloading your own produce less residue? If so is there a reason for this?