Case neck damage
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Thread: Case neck damage

  1. #1
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    Case neck damage

    Has anyone else noticed case neck damage during the break in period? I finally was able to get out and shoot my new XCR today and put about 320 rounds of 5.56 through it. Probably 30% of the cases we picked up had one or more dents in the side of the neck. One we found had a little bit of the lip torn back.

    I only experienced one malfunction out of the lot and that was a failure to eject. It had started to feed the next round and jammed on the empty sideways. Easily cleared, no other problems.

    It was tossing brass about 13-15' with the gas setting on 3.



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    XCR Guru dont_tread_on_me's Avatar
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    Re: Case neck damage

    Try a lower gas setting,they just might be coming out to hard/fast and mashing the neck/case on the ejection port or shell defelector on the side.Ideal ejection distance is about 8-10 feet.




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  3. #3
    Rifleman charliea's Avatar
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    Re: Case neck damage

    Mine does that. I bend them back out before running them through the sizing die. Only takes a minute.

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  5. #4
    DSM
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    Re: Case neck damage

    That brass is still pretty hot and soft when it gets shot out the ejection port, easier to damage. Unless it is really banged up (meaning smashed flat because I stepped on it) I just run them through the sizing die. Hornady dies have a good, tapered button that smooths them back out.
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    XCR Guru ny32182's Avatar
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    Re: Case neck damage

    Mine puts a slight dent in about 10% of them, I'd say, which I believe comes from contact with the shell deflector. The sizing die takes care of it, no problem.

    Like someone said, now that you have run the "break in procedure", you should turn the gas down; that might make a difference for you.

  7. #6
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    Re: Case neck damage

    Ok, the one I saw that was torn kind of worried me a bit, but none of that seemed to interfere with functioning. I'll turn the gas down next time and see how that does.

    Thanks.



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    Re: Case neck damage

    it's typical during breakin. It's just how it ejects the shell. That, or you're shooting next to a wall/something hard and they're denting as they hit.
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    Re: Case neck damage

    Well they were just landing in the short grass so it's happening in the rifle. What I did find odd was that while most cases (of the ones that were dented at all) had a single dent in the neck while others would have 2 or even 3 around the circumference. They were all dented to pretty much the same degree.



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  10. #9
    DSM
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    Re: Case neck damage

    Brush out the chamber real good, you might have some gunk stuck in there. You might try turning off the gas and firing a shot to see if it is internal or just part of the ejection.
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  11. #10
    Rifleman dbooksta's Avatar
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    Re: Case neck damage

    I'm still in the break-in period, running gas setting 4, and I'm getting a very consistent dent in every single neck. However if I strap on my brass catcher I get none! That suggests to me that the dent is occurring when the case hits the ground, but given how consistent it is I find that hard to conceive....

    What gas settings are people typically using for standard .223 loads on 11" barrels after "break-in"?

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