I was shooting an IDPA match today and had a FF. When I cleaned the pistol I found a small (1/32 or so) piece of brass stuck in the throat of the chamber. Once I cleared it the gun chambered fine. Any ideas???
Check your extractor for a chip, a "new" sharp edge might be carving your brass.
For what it's worth all my Sigs throw off an awful lot of brass flakes/chips for some reason, noticeably more than my other brands.
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