Gents,
Here is a related thread on the 1911 forum.
http://forums.1911forum.com/showthread.php?p=1808155
A burr or sharp edge on a Glock firing pin combined with "Known to be soft" Remington 1 1/2 primers or "Borderline" hot loads can indeed cause "Pierces" that would not occur in other model handguns. The condition is then compounded as the hot gases pit or further contribute to the "Rough" condition of the end of the firing pin whereupon the condition exacerbates itself, I have seen this happen. Take particular note of the rectangular shape of the firing pin imprint of a Glock vs. a SIG, Colt, Springfield, S&W , it is self-explanatory and most unique in shape comparatively speaking.
It is simple physics that a sharp corner exerts more direct force in a given area than a rounded shape does; EG: Ram the end of a baseball bat against a piece of tin and look at the imprint it leaves, it bends the metal but does not penetrate it, do the same thing with the end of a crow bar and see what happens, my point exactly, no pun intended.
I submit for your inspection;
The Glock firing pin, rectangular with a rounded end, possessing 2 potentially "Sharp" edges whereas a 1911 or other style pins being completely cylindrical and "Rounded" have none, the others by design, are less likely to suffer from which we speak. Having said that, in this case I do suspect only the primers, even the time tested 1911 firing pin design was putting a hole in the ones referenced in the above link, or visa versa;
There are 2 possible outcomes:
If the result confirms the hypothesis, then we have made a measurement. If the result is contrary to the hypothesis, then we have made a discovery.
Best regards.