Hi Allen, it definitely shows some hard recoil, broken rear corner and such, but the firing pin retainment area looks to be unaltered? I would have to say it is most likely that the extractor retainers on the breechblock could well have failed from just a lot of use? Nothing lasts forever, and in the case of Lugers, sometimes for just a little bit? Good luck with your "NO GO" gauge and testing, I'm still here if you need any assistance that i might render?.... Best to you, til....lat'r....GT
