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Thread: had a primer blow out today and etch my bolt face

  1. #1
    Team GunsNetwork PLATINUM 10/2012 rci2950's Avatar

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    had a primer blow out today and etch my bolt face

    First time this has ever happened. I was working up a load for 130 grain TTSX / .308 win and the primer blew on 45.4 grains of 4166 using winchester brass and primers.



    Pic of the blow out



    Close up



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  2. #2
    Forum Administrator Schuetzenman's Avatar

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    That's odd. Your primer is still has radius at the outer edge. Primers don't usually blow at the edge, I can't recall any that blew out without having flattened the primer in the pocket completely and then flow into the firing pin hole in the bolt. That one looks like a low pressure fail and I'd say there was a defect in the primer cup for that to happen.

  3. #3
    Forum Administrator Schuetzenman's Avatar

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    I looked up your powder, wasn't familiar with 4166. That said it looks to be tailor made for the .308 and should not be a problem. Like I posted earlier, your primer otherwise does not show high pressure signs. Probably the brass primer cup had a serious defect in it. You might want to contact Winchester with the lot number information of those primers. They might offer you a replacement lot.

  4. #4
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    I would make a call to the people that made the primer. They may be interested because
    of where the malfunction is. But I don't know.

    Very glad you were not injured.
    While no one ever listens to me,
    I am constantly being told to be quiet.

    In a world of snowflakes,
    be the heat..

  5. #5
    Team GunsNetwork PLATINUM 10/2012 rci2950's Avatar

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    I emailed these pics to winchester and am now waiting a response. Googling this tells me this is a common thing for winchester primers and is the main reason they are usually the most plenty full on the shelf at any sporting goods store. I will be using CCI for now on.
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  6. #6
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    Wow. I am no where near re-loading so I did not know this.
    While no one ever listens to me,
    I am constantly being told to be quiet.

    In a world of snowflakes,
    be the heat..

  7. #7
    Senior Member NAPOTS's Avatar

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    Quote Originally Posted by l921428x View Post
    Wow. I am no where near re-loading so I did not know this.
    I had an AR that was piercing them when I first got it. There was a small burr on the firing pin. I ended up taking an arkansas stone to the firing pin and smoothing it and it hasn't been a problem sense.

  8. #8
    Team GunsNetwork PLATINUM 10/2012 rci2950's Avatar

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    They replied. Said a representative is reviewing my case and will be in contact shortly
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  9. #9
    Administrator imanaknut's Avatar

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    Quote Originally Posted by rci2950 View Post
    They replied. Said a representative is reviewing my case and will be in contact shortly
    Glad to hear this, thanks for the update!

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