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Thread: steel case rim tore off, case got stuck in chamber.

  1. #11
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    Quote Originally Posted by black22rifle View Post
    what gives you that idea?



    yes the case heads are a bit damaged. I could not get a really good picture of it. They indeed are "pulled" on one edge, it also looks like something clawed at it. How would an undersized chamber produce this.
    Cases swell after ignition to form a seal in the chamber. A tight chamber will not allow the cases to "shrink" or relieve enough pressure before the bolt unlocks and extraction begins. So, your bolt is clawing at a case that is still swelled and ripping the rims. It could be other issues, but this seems most likely.

    It usually happens with higher pressure ammo like full 5.56, though, not Tula.

    They make a field gauge that drops in to check your chamber, but if its new I'd call PSA and make them deal with it.

  2. #12
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    Steel case don't obturate very well and gasses get into the chamber and leave carbon deposits. A brass case will obturate and firing a brass case after loading up the chamber with carbon will press the carbon against the chamber walls. Follow that up with firing a few more steel cases, which has more stiction than brass (carbon is sticky too) and your setting yourself up for a stuck case.

    When the extractor rips the case off, don't drop a rod down the bore and start pounding on it with a hammer. Take the rod and toss it down the bore and let the momentum do the job. It may take a few tries but it works. Pounding on the rod can lead to complications from bending and other things. I've driven out a few stuck cases with no drama by simply using a solid piece of drill rod about 12" long that just fits freely and just tossing or dropping down the bore
    INSIDE PLAN OF BOX
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    5. HA-HA!!

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  3. #13
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    Quote Originally Posted by Pork Chop View Post
    Cases swell after ignition to form a seal in the chamber. A tight chamber will not allow the cases to "shrink" or relieve enough pressure before the bolt unlocks and extraction begins. So, your bolt is clawing at a case that is still swelled and ripping the rims. It could be other issues, but this seems most likely.

    It usually happens with higher pressure ammo like full 5.56, though, not Tula.

    They make a field gauge that drops in to check your chamber, but if its new I'd call PSA and make them deal with it.
    would a heavier buffer help? I ordered a blue sprinco spring and an h2 buffer.

  4. #14
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    Quote Originally Posted by black22rifle View Post
    would a heavier buffer help? I ordered a blue sprinco spring and an h2 buffer.
    Both of those might be overkill. My BCM midlength only needed a Sprinco white with a C buffer, it shortstroked with an H1 added. I run a Sprinco blue with H1 in my LMT. I've read Tula is know for cases keeping ripped apart on extraction. I've never had that happen with Wolf, Brown Bear and Silver Bear. I've got about 15k total through my gun and about 12 of that is steel case. I did have 2 stuck cases at twice and changed my extractor spring each time. I now keep a few of those on hand and change every 3k or so.
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  5. #15
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    Quote Originally Posted by black22rifle View Post
    would a heavier buffer help? I ordered a blue sprinco spring and an h2 buffer.
    Not if you have a tight chamber/throat.



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  6. #16
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    I was inspecting some more cases and a few have visible indentations on the rims from the extractor and one has a very noticable indentation on the head from the ejector. This means early extraction which means overgassed correct?




  7. #17
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    It sounds like a tight chamber like F2S stated.

    I would clean the chamber thoroughly, apply a generous amount of lube to the bolt and carrier and shoot it. The rifle will loosen up as you shoot it.

    Throw a multi-piece cleaning rod in your range gear. You never know when you might need it or want to loan it to someone else on the range.
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  8. #18
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    Those last pics with the ejector marks, and the line from the extractor look like overpressure indications. Were those factory or reloads? Could be a chamber problem causing the overpressure given the earlier problems. But the two may not be related at all. Hows that for a non-answer?

  9. #19
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    Quote Originally Posted by black22rifle View Post
    I was inspecting some more cases and a few have visible indentations on the rims from the extractor and one has a very noticable indentation on the head from the ejector. This means early extraction which means overgassed correct?



    Are the marks around the cases (about 1/4" or so from the rims) simply marks or are they the beginning of case separation? They look very much like the cases are stretching and nearly separating in the first and third photos.

  10. #20
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    Quote Originally Posted by T2C View Post
    It sounds like a tight chamber like F2S stated.

    I would clean the chamber thoroughly, apply a generous amount of lube to the bolt and carrier and shoot it. The rifle will loosen up as you shoot it.

    Throw a multi-piece cleaning rod in your range gear. You never know when you might need it or want to loan it to someone else on the range.
    I probably should have mentioned this earlier, but I have never cleaned it since I have had it other than wiping down the BCG. Out of the 250 rounds through it about half has been Tula.

    Quote Originally Posted by tonesurfer View Post
    Those last pics with the ejector marks, and the line from the extractor look like overpressure indications. Were those factory or reloads? Could be a chamber problem causing the overpressure given the earlier problems. But the two may not be related at all. Hows that for a non-answer?
    They are factory Winchester 5.56 q3131.

    Quote Originally Posted by SkipD View Post
    Are the marks around the cases (about 1/4" or so from the rims) simply marks or are they the beginning of case separation? They look very much like the cases are stretching and nearly separating in the first and third photos.
    I did not notice any case head separation when I looked at them but I will check again. I believe that just might be the taper before the rim.

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