Been having some of the dreaded doubling issues on the izzy in the last three sessions, but interestingly the doubling always happened when using SK Pistol Match ammo. Eley Sport and Wolf didn't cause any problems. Anyway, I took the pistol down and gave it a good cleaning; it was super dirty! I suspect the dirt on the extractor and on the chamber face could have been responsible for the doubling. But I took some pictures of the chamber to highlight the thin area on the right side of the chamber where the extractor slides past the rim to grip the round. I'm not really sure what the spec of this area is supposed to be, but its definitely a little thinner than the others. I didn't notice any burrs or deformation or peening on the chamber face, but I might not have looked close enough. Anyway, here's hoping that the doubling doesn't come back as long as I keep it properly cleaned.
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