Full mag or minus one?

I have heard both sides of whether or not to leave your carry mag full or to leave one out.The "minus one" argument seems to come from two angles:Loading a mag while in battery is easier and less prone to failure when the mag isn't to capacity. So this would seem to apply only to a spare mag that was going to be tactically reloaded.After time, full mag with spring fully compressed can FTL on last rounds. This seems to be the main argument for not leaving a full mag. But from what I understand this is older or cheaper magazines and shouldn't apply to newer, quality magazines.What are your experiences with this and have you heard any other reasoning for leaving one less than full in carry mag? via /r/CCW https://ift.tt/3838YXt