I wish I could have participated in this thread earlier... I was on vacation for the last week...not a lot of computer time...
I have had a similar thought process as JohnKSa, and I made a similar point about a month ago regarding bear defense rifles. Given some probability of hitting a vital spot, it is always better to put more bullets on target than less.
It is analogous to an aircraft mounted gun. They don't use sniper rifles on aircraft. They use machine guns with a extremely high rate of fire. It does not take hundreds of hits with a 20mm cannon to bring down a fighter or a helo... it only takes one. But the probability of making that one hit goes way up if you can fire a burst of 100 rounds per second.