I will still go back to the statistics of law enforcement gun fights where 2 hits are necessary to subdue an enemy and the average hit percentage was 1/3 of the time. At this point, the trained officer had taken, on average 6 shots to subdue one criminal. At this point it is simple math. If there is one more attacker you will run out of rounds if you only have 8. Of course every circumstance will be different, but it is doubtful that attackers will be hanging like a sheet of paper at the range directly in front of you. So, something to consider.
