Only hits count. If you are shooting faster than you can make good hits on your target, you are shooting too fast (unless it's suppressive fire). You are not going to make any hits, much less good hits, pulling the trigger as fast as possible unless your target is huge/close.
I'll let you all in on a little secret - Just because you have 60 seconds to get off 10 sustained fire shots doesn't mean you have to take that long. You just have to slow down enough to make good hits.
Some of the smart cookies finish with enough time to take care of any malfunctions/other screw ups.
