My comments from anotehr thread....
1) At this time, No one knows or has reported what make/model of pistols the shooter used.
2) Let us assume that he had 2 Beretta M9 - 9MM military issue pistols.
3) Beretta M9 uses a 15 rd dbl stack magazine.
4) Two gun w/1 magazine each = 30 rds. 2 magazines each pistol = 60 rds. continue the math.
5) Magazine drop/reload = 3 to 5 seconds..
6) volume of targets in close confine area..
There were a lot of deaths and injuries. But, there could have been more had it not been for the response of the civilian PD.
Keep in mind that every injury may not be a bullet wound.