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.45 ACP Rim damage

Discussion in 'Handloading and Reloading' started by lordpaxman, Sep 30, 2019.

  1. lordpaxman

    lordpaxman Member

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    This is range brass, I'm pretty sure it's once fired, and this damage only appears on Winchester head stamps. And, it doesn't occur on all Win .45 brass, just some.
    I'm curious what others might have seen, or think this might be caused by? It's not a problem for reloading or shooting in a semi-auto, where it's a problem for me is if I use these in my 625, the deformation on the rim presses the moon clip and causes cylinder binding.
    45ACP RIM DAMAGE.jpg
     
  2. saiga308

    saiga308 Member

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    trucker long hauling everywhere LOL
    primers look a bit flat to me maybe the bullets are to far out in the cases on some of them hitting the rifleing causing pressure spikes
     
  3. Jim Watson

    Jim Watson Member

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    I think that shows it was fired in a 1911 with uneven "J cut" on the side of the breechface.

    I keep M25 revolver brass separate from automatic brass.
     
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  4. saiga308

    saiga308 Member

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    trucker long hauling everywhere LOL
    found this on the web appears u best watch closely on bullet seating
     
  5. earplug

    earplug Member

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    Either the brass hitting the ejector or the extractor marking the case. Just toss them if they don't work in your clips.
     
  6. reddog81

    reddog81 Member

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    The mark is where the case smacks into the ejector. Those look fairly normal. If it causes a problem with the 625 take a file to the offending area and clean it up a bit. One or two swipes with a file will knock down any burrs.
     
  7. rdnktrkr

    rdnktrkr Member

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    Looks like extractor to me, maybe Win brass is a little softer, I have a M&P 40 that "marks" every case it shoots but never jams and cases are reusable.
     
  8. edwardware

    edwardware Member

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    Primers look good (not that you can depend on that in 45ACP). The mark on the head is very common on brass through a 1911, and I agree with the above that it's likely smacking something on its trip out of the gun.
     
  9. mdi

    mdi Member

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    I would guess by the shape of the ding, is it's hitting something as its being ejected. None of my 3, 45 ACP guns have a wide flat ejector. I think a shooter that was shooting Winchester brass just left the brass and his gun was marking the cases on ejection.

    Sorta on the same track, my Garand with certain reloads will ding case rims much like the 45s pictured above. The brass was hitting the OP rod hump as it was ejected.
     
  10. drband

    drband Member

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    Looks like the base hits the front of the ejection port on the way out of a 1911. Pretty common.
     
  11. BlankRow

    BlankRow Member

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    That looks like it was fired from a 1911 that has an issue with inertia/push feeding. If you look at the other side of the rim there is probably a gash on the edge of the rim where the extractor is snapping over.

    In my experience this is caused by a week magazine spring, spread feedlips, or the magazine geometry/design. Constantly push feeding like that will cause the extractor to lose tension quickly, and eventually result is failures to extract.
     
  12. Walkalong

    Walkalong Moderator

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    Yep, had a Kimber that did it until I fixed it.
     
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  13. Demi-human

    Demi-human Member

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    My Taurus still does this. It is as Jim said. Not bad enough for me to worry about.
    My Wesson is more deftly manufactured...;)
    None of it's Starline brass shows any marks what so ever.
     
  14. RodII

    RodII Member

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    As has been mentioned, the problem is the j cut, it can be seen by looking at the breech face.
    I have a Dan Wesson Valor that had this problem, a machinist friend fixed it by working on it with a scraper and then a little polishing.
     
  15. mdi

    mdi Member

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    For us less knowledgeable; what's a "J cut"?
     
  16. Blue68f100

    Blue68f100 Member

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    A "J Cut" is on the left side breach face of the slide where the base of the bullet slides up into when chambered. The right side has the extractor. When done right it is smooth and no marks will show up on the brass. When the 2 cuts end at different heights you end up with a mark on the brass.
     
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  17. Rod47

    Rod47 Member

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    Check your moon clips for correct thickness and be sure they aren't sprung.
     
  18. lordpaxman

    lordpaxman Member

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    Thanks for all the insight! If I connect with the guy whose gun does this, I’ll try to get back to this thread.
    Regarding my 625, the moon clips are fine, the indentations telegraph through the rim and are enough to cause binding if I inadvertently use one (or more). I could file that down, but, it’s easier to demote these to the box that holds the reload-and-leave-behind cases.
     
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  19. jmorris

    jmorris Member

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    Looks like where it contacted the ejector. A casepro can iron them back out.

    ADE2AA6F-B24C-4279-958D-30083FF48078.jpeg

    However, as you noted, not all firearms mess them up, so it might not be worth it to you.

    All that said, I switched to 45 GAP brass for my moon clipped 45’s. No tools needed to moon or demoon and the small primers allow for a lighter trigger pull while retaining 100% ignition vs LP.

     
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