I haven't been on this thread for a while. I see there have been many attempts to find cause based on any number of reasons. A few comments if I may. I worked for a large police department for over 20 years. I was factory trained Glock armored. I have fired over 30,000 rounds thru Glock pistols. I've never seen a situation like mine before either.
My loads were with virgin factory primed Federal cases. I weighed EVERY charge on my very accurate digital scale (.01 grain accuracy). I used coated bullets that were designed for this use. There was/is no leading in the barrel. I loaded enough to test fire 3 full magazines and a 100 rounds for my use. I had not fired a single loaded round since this initial testing back in April. The gun let go on the second round from this magazine. I had a 20 pound Wolff spring in it. On closer inspection the frame is cracked from the mag release through the trigger guard. I'll send it back to Glock for a new frame. I'm not sure what went wrong. Maybe all my loads were too hot and this was inevitable.
