I can say this about how many shots it takes, if you don't aim you can't miss fast enough. If you aim true the other guy dies with a bunch of rounds in his weapon. if you worry about what he has you are already behind the curve, concentrate on using what you got as well as you can.
Like inches, it doesn't matter how many you have but how you use them. having a bunch of either just leads to sloppy work and lazy efforts.