Unless it slipped here in some posts I missed, I still haven't heard a great explanation as to why the Glock, in particular, is so sensitive to trigger placement?
Yesterday, with a Glock 17, I was consistently having shots go to the right edge of a one inch square at 7 and 10 yards. Big hole group, but slightly right. My reaction was, as a right hand shooter, I needed more finger on the trigger? At 25, staying on the head, but slightly right of center.
Or, my finger placement is actually right now, and I now need a slight rear sight correction. I have shot this particular pistol extensively at 25-100, and worked hard to get the rear sight set correctly, which argues against this. Sun was from the left side, what is the rule of thumb for what sun does to POI?