Speed and accuracy work together, which is to get hit(s) as soon as possible. Pressing the trigger at the speed needed to control the sights to hit your target is what it's all about. If the threat is in anyway difficult to hit, you will need to slow down on the trigger and focus more on sight alignment. If the threat is close and easy to hit, then .....this is no time for a bullseye type group, in fact, you need to be pounding shots into the threat as fast as possible and stop the threat NOW! Most of the time you will be somewhere between the two above examples. My rule of thumb for combat shooting; If your threat is larger than your front sight, better get ta shootin' If your threat is the same or smaller than your front sight, better get on them sights and fast. Practice this process slow at first..........remember, slow is smooth, smooth is fast. Speed will come with practice. Your decision on how fast vs. how slow to press the trigger, how much front sight vs. combat look through and/or body index is based on two things, your perception of the threat situation AND your perception of your skill with your equipment. If you practice only one trigger press and sight alignment you are a target shooter and not preparing yourself properly for the street, and doing yourself an injustice. Recognize the need for different levels of trigger press and sight alignment, practice at those levels and in between. In the fight have the ability to adapt to the situation smoothly not to survive, but to decisively win!