The chart can by much abused and understood. I would only use it as a possibility chart. The bullet goes exactly where the gun is pointed when the trigger hits the back of its travel and the firing pin is released to strike the primer. If you are missing the bull, you are not keeping your eye on the front sight. It may help to also keep the trigger pulled to the rear after taking the shot. Release it after recovering from the recoil and when you are ready to take the next shot. I see too many beginners pulling the trigger and letting go of it right away and not following through with watching what the gun is doing or where the sights are pointed. Grip, stance, breathing, trigger control, FRONT SIGHT.