So you dont have an explanation and cant define it it? Got it. I know why theres no breakdown of lethality by firearm and its painfully obvious you dont but keeping trying. I'll give you a hint though, what would you rather have a, .223 to the head from 10 yards, a .300 subsonic to the head at 10 yards, or a .380 to the head at 10 yards? Figure that out and you've figured out why theres no way to measure. Guns are made to kill, period. Thats why the whole "assault weapon" makes zero sense, that's literally what every gun is made for. Rifles are just made to touch targets further out, but in the scenarios around these shootings, caliber doesnt matter. They're all potentially lethal and by far the biggest factor is shot placement, not caliber. In close quarters with no medical aide available, it doesnt matter what caliber you're hit with, it matters where and how many times. Is a glock 17 with a 33rd mag capable of that just as .223 ar with a 30 rd mag? Theres no difference. With nobody returning fire, is there a difference, absolutely not. Theres no need for quick reloads or high count mags. There is no "lethality" you dipshit because there are so many variables going into every single shot it's impossible to measure.
And stop with the whole military uses ar's bs...ar10's were used before the military adopted the platform, the military only adopted it because they were able to purchase the manufacturer, and are getting rid of the caliber that's so devastating, its banned from hunting whitetail deer in most states. Does the military use rifles, yes. They play at longer ranges than school shootings. They also use 1911's, PCC's, sub machine, remington 700, and shotguns, all readily available to the public. The Benelli m4 was made for the marine corps but dont hear a peep about that and I'd rather take a 5.56 to the leg than 12g buck or .338 lapua. Just stop, you're spewing lies based on emotion not facts and logic because you know zero about firearms.