-The threat chooses to stop. Also known as a psychological stop.
-The threat bleeds out, also known as exsanguination.
-The spinal cord or other support structures are damaged and causes the threat to be immobilized.
If we think about the task that we are preparing and training for, speed combined with precision is the goal. Of course spreading out those shots some can help deliver a greater amount of damage. Since most meat moves when you shoot at it, your ability to pull the trigger at the right time will most likely ensure that the bullet impacts the target in an effective area.