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Look at my 10mm primer strikes!

Discussion in 'Handloading and Reloading' started by alpha6164, Aug 9, 2010.

  1. alpha6164

    alpha6164 Well-Known Member

    Here are a few brass from my session this weekend. These were shot in lone wolfe barrel from Glock 20. The brass cases are from Georgia Arms 180gr FMJ range ammo which chrono'd 1085ft/sec so is not a nuclear load. The nickel brass you see are from DT 135, 180 and 200gr loads.

    The cases themselves look fine without any signs, but not sure why the primers look like the firing pin was dragged across the face of the primers. I am not sure if i have noticed that with my other hand guns.

  2. TexasRifleman

    TexasRifleman Moderator Emeritus

    That seems to be pretty common with the Glock. If you search the web for "Glock primer strike" you will find a lot of them that look exactly like yours.

    It doesn't appear to be any cause for concern from what I've read about it.
  3. beeenbag

    beeenbag Well-Known Member

    Texasrifleman hit it right on the head. This is very typical for a glock. Even my 9mm glock does this. No concern whatsoever.
  4. ljnowell

    ljnowell Well-Known Member

    Normal for 10mm, 9mm, 40 from a glock.
  5. alpha6164

    alpha6164 Well-Known Member

    Thanks guys. I feel better now :)
  6. RyanM

    RyanM Well-Known Member

    Those are flowing into the firing pin channel a little more than I might be comfortable with for my handloads. Though factory ammo looks exactly like that in my experience, so I'm probably just paranoid.
  7. Sport45

    Sport45 Well-Known Member

    Because that's exactly what happened. The barrel unlocked and began tilting while the firing pin was still in contact. As others have said, it's normal.

    HOWARD J Well-Known Member

    When I pick up my 9's at the indoor pistol range---
    I look for the Glock strike.
    Works good----cases last for many reloadings.
  9. Sport45

    Sport45 Well-Known Member

    Why? Are you keeping them separate or something? I never give much thought to whether or not the primer has been wiped on a 9mm case.
  10. cougar1717

    cougar1717 Well-Known Member

    Very typical if you've picked up any amount of range brass.
  11. mousegun380

    mousegun380 Well-Known Member

    Yea I've heard it called "primer smear".
  12. ReloaderFred

    ReloaderFred Well-Known Member

    Primer swipe is the term most used when the firing pin hasn't fully retracted before the slide starts to move to the rear. It's pretty common.

    Hope this helps.

  13. W.E.G.

    W.E.G. Well-Known Member

    I am bothered by the amount that the primer flowed back into the firing pin channel.

    MAGNUM primers probably would reduce primer flow.
  14. dsv424

    dsv424 Well-Known Member

    Thats exactly what my primer strikes look like from my Glock 20. In fact that is normal because of the shape of the Glock firing pin.
  15. cpaspr

    cpaspr Well-Known Member

    As others have indicated, that is what every Glock fired case I've ever seen look like, regardless of caliber.

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