My shots are consistantly off to the left and down when shooting at the range. I shoot a bit low, but straight, when shooting without sighting. When aiming, is the fact that I use one eye to focus the cause of my shot being off center? That's what I'm assuming because without focusing on the front sight, my shots are straighter. I shoot with a squared parallel stance and/or right leg back. Whichever stance I use, I'm constantly off south west. These pictures are 20 rounds at 10 yards for each Glock that I shot with.