1914 Fire pin issue

[klq9386]

A recently had a 1913humpback stolen from me and got a 1914 to try to replace my favorite gun I owned. The one issue I am having is when the slide slides forward when putting the clip in the firing pin 25% of the top goes forward. If I continue to cycle its hit and miss on when the firing pin stays back in the cocked position. Every time I pull the slide back and look underneath it the firing pin is locked back. If when I slide it forward I slow the slide down with my hand it will never fail. Its only at full speed.
 
If anyone has any pointers to what could be causing it I would greatly appreciate it.

[pardt]

Just a opinion but it sounds to me that the firing pin is not fitted to the gun or is wore down where it catches on the sear. I have on a couple of my guns just to try it switched firing pins. Some would work in all and others would work just in the gun it came in. As a particular gun is fired parts will wear in to the surrounding parts and cause the problem you are encountering. Just my .02

[pardt]

Also I am sorry to hear about your pistol being stolen. A humback is on my list of guns to acquire and I would hate to have any of my guns stolen.