“My understanding is that AR-15s don’t take much skill to use. Given the firepower, the velocity, the sheer number of bullets it can pump out in a limited amount of time, little recoil, etc., if your goal is to kill a lot of people, it is very efficient at that. With a handgun, it seems there is a lot more skill involved to aim and kill.”
I’m not sure I’d agree with this. My husband is a range safety officer and board member of several local shooting ranges/gun clubs; he participates in and officiates at several different type of shooting competitions including something called “Three Gun” where competitors complete different target shooting scenarios using a handgun, rifle and shotgun. None of this is something I especially seek out (if DH weren’t in my life I wouldn’t even own a gun), but for the sake of being supportive, I’ve participated in the various trainings and even a few competitions.
If you have a stationary position upon which to steady the weapon, a rifle (and an AR is just an example of a rifle) is very easy and efficient once you’ve zeroed in on a target. But that’s not my understanding of how the school shooting happened. If a shooter is wandering through rooms and shooting from a standing position, it can get tiring quickly to aim and steady a rifle. Walking into a classroom, for example, it would probably be easier to aim and accurately fire a handgun than a rifle. And after several minutes of wandering around and shooting, unless the shooter has done quite a bit of practice, that rifle gets heavy and accuracy decreases quickly.
And with a very small amount of practice, it takes someone around one second to drop an empty magazine, insert a new one and be ready to fire a handgun again. After watching just a few of the competitions, I quickly became disillusioned with the idea that banning large capacity magazines would make one iota of difference in these mass shooting situations. Even if each magazine only holds 10 bullets, it takes almost no time to switch them out, so I’m not convinced that’s a factor in the casualty rate of the shootings.