Florida Senator Marco Rubio is among many being told that ten-round magazines will mitigate deaths in mass murders, and create the opportunity for courageous unarmed citizens to jump the killer while he’s reloading and disarm him.
That has actually worked sometimes. It has also gotten some well-intentioned unarmed citizens blown away. It also presumes that shooting ten people before the reload is somehow an acceptable casualty rate.
An armed, properly trained faculty member, by contrast, would be likely to stop the killing a whole lot sooner with a whole lot fewer casualties.
I may have posted this here before, but right now, it seems timely: https://americanhandgunner.com/disarming-mass-murderers/ .