What does polishing the breech face do for reliability?
When the round slides up at an angle under the extractor, it is the breech face that the edge of the round is rubbing/riding up on, so the smoother it is, the less friction & resistance, thus the round tends to slide up / in and under the extractor easier. But without adjusting the extractor correctly, it is a pointless modification. Q: Why do you recommend to “Fit & Polish” for my extractor? A: 99% of extractor breakage is from a cartridge butting against the face of the extractor hook (usually from someone dropping one in the chamber and dropping the slide (BIG NO! NO!)), occasionally it is from the magazine prematurely releasing the round before the slide pulls the round out and guiding it under the extractor. Polishing the extractor face will generally make the extractor flow around the cartridge case rather then butt into it and gall on the brass, think of it as if you pressed soft brass onto a ball bearing, rather then medium-rough concrete, which would give way are work around a
