Originally Posted by English
I can't believe that the impact of the ramped nose of the extractor against the rim of the cartridge would be enough to damage either. The extractor is clearly designed so that the rim of the incoming caartridge will slide up underneath it in the normal rechambering process. It is also clearly designed so that it will cam over the rim of a cartridge which is already in the chamber and I know an instructor who believes he must have done this several thousand times with the same G19 in the process of demonstrating misfeeds. His extractor is still the original one.
This does not mean that extractors cannot break but I doubt that they break for this reason.
I agree with the point English is making here, it looks like the ramp on the chamber side of the Glock extractor should ride over the case rim. It just seems like it doesn't want to work that way though. It may work better if the bevel were cut at a more shallow angle.
I'm gonna need to disagree about the 1911. Their little thin, beveled and polished extractors will ride over a chambered round, without any problem. I don't do that, though and it's not a particularly good idea to load a 1911 that way. Any pistol that is going to be issued to an army needs to be foolproof. The 1911 never had a reputation for breaking extractors, because of the design.