Whirly, As you point out 8, 6, 4, 3 magazines is all dependent on your resupply capability and duration of the engagement. For instance if you are at home and have easy access to more loaded mags then less could be safe. If you were bugging out without a known resupply time frame you probably want to carry more ammo. Maybe where you live carrying additional water is more important. Around my location a bottle & purifier is all you need, I’d rather the ammo.