I have a police trade in factory refurbished Glock 17 with hi-cap mags. The weapon functions flawlessly after thorough cleaning up through 200 rounds. After that I begin to get misfires. The ammo misfiring are not duds. But I have noticed all misfiring rounds show the dimple imprint from the firing pin way off on the edge. All firing rounds show the dimple virtually dead center in the primer. Also, if I reload the dud rounds in an empty magazine, load the pistol and fire, they all fire off without mishap. Any ideas? Could it be a bad firing pin? Is the slide not returning to full battery? Thanks for your help.
------------------
Safe shooting - PKAY
------------------
Safe shooting - PKAY