When I first purchased the G17 It shot perfect. My greediness got to me though. Every time I go to the firing range I'd go through at least 250 to 300 bullets im usually there for about 2.5 hours. I was shooting great at first from 30' but now my shootings gone to hell. Aiming at the X i usually hit the 9 or 8 its horrible and this is really depressing me!!! Im wondering if excessive shooting has affected the gun in any way? Another wierd problem was that after about 200 rounds the pin which holds the gun together starts to come out slightly. Could of been fatigue on my part but just checking if excessive rounds will affect the gun.