Where is your finger in relation to the trigger? Is the trigger in between the end of the finger and the first joint? On the first joint? Usually low and to the left means you are not pulling straight back on the trigger which could be due to incorrect finger placement. When you are shooting you are pushing the barrel a little too the left. You could also be anticipating recoil. Here are two exercises which should help.
1. Put in some snap caps and practice dry firing. If you are doing this inside your home stick to one room. Put a few dots up on the wall to aim at. You can also put a couple pennies on the front of the gun, trying to keep them on when you are firing. Double check or triple check that you have no real ammo in the gun and keep ammo out of the room you are practicing in altogether.
2. While at the range have a friend load up your magazines. Have them their in a snap cap or two. Watch what happens when you get to the snap cap. Do you flinch?
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