I think LEO average % of hits in a firefight is something like 17%?
So lets say a bad guy is at least as trained as the cops, if they fire off 100 rounds thats only 17 hits.
The guys in North Hollywood were employing more surpressive fire than anything. I think only 3 or 4 officers got hit out of all those rounds fired.
"....The swords of others will set you your limits".