trigger control
THE CONSTANT TRIGGER CONTACT TECHNIQUE
aka "Catching the Sear" or "Catching the Link"
(works with nearly any self-loading semi-automatic firearm except some DAO designs.)
1. Place your finger on the trigger so that the pad of your finger is in contact with the trigger. With your finger in position on the trigger, there should be some space between your finger and the frame of the weapon. This will allow you to pull the trigger straight to the rear, firing the weapon without disturbing its aim. If your finger is too far through the trigger guard, so that it lies along the frame, or if you have your first joint rather than the pad of your finger on the trigger, pulling the trigger could push or pull the weapon to the side.
2. Using smooth, steady pressure, pull the trigger straight back, letting the weapon fire. Keep your finger in contact with the trigger. Hold the trigger to the rear as the weapon cycles and another round is loaded into the chamber. The recoil may make your arms and hands rise slightly. Get the weapon back on target as soon as possible.
3. Allow the trigger spring to push the trigger—and your finger—forward only as far as needed for the trigger to reset for the next shot. You will feel and hear a click as the trigger resets.
4. Continue the same sequence for subsequent shots.
If you can do this, and avoid "slapping" or "bouncing" the trigger from shot to shot, your groups will tighten up. Many shooters have trouble with the DA/SA transition because they let their finger break contact with the trigger after firing that first double action shot, and as a result they "slap" the trigger to fire the subsequent single action shots, which usually results in shots going low.
It's critical that the gun properly fit your hand. If the grip is too big, and if your trigger finger contacts the side of the frame when you are shooting, you will have trouble getting good control on the trigger and may push or pull shots to one side or the other.
As a practice drill at 5 or 7 or 10 yards, beginning from low ready come up on target, fire one precise shot double action. Hold the trigger to the rear as the gun cycles and then let the trigger out only far enough to reset the sear, (you'll hear and feel a "click") and then press off another shot. Decock if necessary, and then repeat the procedure. With practice, your group size will shrink.
When you can shoot tight groups at 5 yards, move back to 7 yards, and then to 10 yards. When you are consistent shooting tight groups from low ready, then work from the holster, always working to be smooth & accurate rather than fast.