In 1914, Sergeant Instructor Alfred Snoxall put 38 rounds into a 12" target at 300 yards in one minute with a No. 1 Enfield, a bolt-action rifle.
The cartridge fired by this rifle was designed to stop a cavalry charge by disabling the horses at a range of 600 yards.
I presume this would fit Morgan's definition of "30 or 40 rounds in less than a minute that can cause mass murder".
Does he thus presume to outlaw century-old bolt-action rifles?
Eventually. One step at a time.