I recall reports that Lanza did not fire full magazines, but changed then well before they were empty, meaning high cap magazines were not a factor at all.
“Lanza changed magazines frequently as he fired his way through the first-grade classrooms of Lauren Rousseau and Victoria Soto, sometimes shooting as few as 15 shots from a 30-round magazine, sources said.
More than a week after the shooting, investigators were still finding bullets under doors and in carpets and walls in the school as they tried to match the casings to the magazines.”
He could just about empty one 10-round mag and then pop in another in seconds while having the other handgun ready in case someone tried to jump him. When the tactical claims are bogus, you know there is another agenda here.
“I recall reports that Lanza did not fire full magazines, but changed then well before they were empty, meaning high cap magazines were not a factor at all.”
Nor are they a factor for anyone shot by the first 10 rounds out of the AW.
At the age of 20, unless military (which he was not), Lanza wouldn't have a lot of hands-on with firearms.