Question for the more expert... I carry one in the chamber but never have my mag fully loaded. I was told by many people, including some officers... That not to fully load your mag, for example if your mag can have 15 rounds, you should only carry 12-13 rounds. This is to not wear off your spring over time, especially if you don't go to the range often and leave your rounds inside the mag a long time. True?? What do you guys think?