Broken extractor pin
I've shot thousands of .223 with no problems with extractor pins. But my new build in 7.62x39 using a Mod.1
bolt/ Bushy carrier blew one within 50 rds.. I have heard that this round is hard on bolts.
I found no insert inside the extractor spring. Could this have caused the breakage or do Mod. 1 parts just suck?
Going to go with crap extractor pin on this one, with it being hardened incorrectly and the reason that it snapped.
And yes, you want the rubber insert in the extractor spring.
It's purpose is to keep the spring from collapsing sideways over time.
take the bolt and look at it closely......run a needle or the end of a paper clip across the face of the bolt until you get to the extractor........if it slides across the joint...you are good....if it drops a little......fine too.....if it hangs because the shelf of the extractor is a little proud of the bolt face....the the extractor pin is taking the full brunt of the bolt thrust when the action cycles.......and you are gonna continue to break extractor pins.either replace the extraxtor or fit i with a dremel and an abrasive wheel......just have to dress the face very gently with the edge of the abrasive wheel so that the round contacts the bolt face and not the extractor..... and it should solve the problem.IF the extractor is proud of the bolt face. A LOT of bolt are made by opening up a 5.56 bolt....and they can cut them a little deep when they are made.
I tested the bolt face as Mad Machinist suggested and it's GTG.
Thanks for the tip though. I will see what happens with a new
pin (ordered a bunch from Brownells) and a black insert inside the
extractor spring. Plan on shooting on Thursday.