You can carry six guns and thirty magazines, but most of us only have two hands and hopefully some common sense. I hope nobody on this board is placed in a circumstance like this, but think about it. Shopping for food and you hear the loud report of rifle fire in a confined space without hearing protection, your endorphins and adrenaline begins to pump instinctively while you spend a few precious seconds realizing what you just heard. Do you run toward the shots or away, no comment here on what somebody does, a choice you make individually. Your assessment in the few seconds that have elapsed what has set in with the majority of the populace in the store? Panic, people screaming, yelling, hiding, pushing and running to exit. Draw your weapon, search for the shooter, be mistaken for the shooter. On the chance or choice your weapon is drawn and you encounter the shooter, you have seconds to make a decision to engage, fire, strike the shooter sufficiently to stop the threat. If that isn't done with six or less rounds in mere seconds, the reality is you probably won't have to worry about reloading a magazine or a cylinder with a speed loader.