27 dead in school shooting

Give me 5 10 round magazines and add the literal 2 seconds in for a quick mag change versus the 50 round magazine in my TEC9.

I press a button, magazine drops, new one slides in, release, round is chambered.

Outlaw everything but “sporting” rifles. Shot guns will still make a mess. Shooters move to sniper style shooting with bolt action rifles. How long did the DC Sniper terrorize that region, firing one shot each time?

Or should we factor in three 5 round magazines and double the people shooting to two?