I've always believed my rifle to be reliable, but today I was re-zeroing with Wolf Gold and got two failures to extract in 40 rounds. The rifle is a 16" Centurion mid-length with BRT 0.076" insert, A5H2 and mil-spec rifle spring. Both times, the empty case was only halfway out of the barrel extension and the fresh round jammed next to it.
What's troubles me is that the BCG is relatively new, with less than 300 rounds through it, and I put a BCM extractor spring with black insert in it not long ago. Is this early fatigue of the extractor spring or something else? I expected the BCG to go at least 5k rounds before spring replacement. Is that unrealistic?
Below are photos of three extractors, the middle one is the one giving me trouble. The left one is from a Sharps Relia-bolt and the right one is from a Colt LE6920, both with under 200 rounds.
If there's nothing obvious with the extractor or spring, all I can do is replace with another BCM extractor spring and black insert. Without identifying the cause of failure, it'll take some $$ of ammo to restore my confidence.
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