I just acquired a new Glock 19 (my first Glock) with standard sights. I took it to the range and shot two magazines from 5 yards and each shot hit about two inches low of where I was aiming. I then tried my Ruger SR9c from the same distance with the same sight hold and I was consistently hitting where I was aiming. My dad did the same thing and experienced the same two inches low. Has anyone else experienced a Go ck s shooting low? Any thoughts on what I can do about it?