Hard seating primers.

Discussion in 'Handloading and Reloading' started by Captcurt, Dec 8, 2020.

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  1. Captcurt

    Captcurt Member

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    I decided to use up some PMC primers that I acquired during one of the Obama period shortages. I had new and some once fired brass, a Lee handheld priming tool and was loading 6.5 Creedmoor. The primers were very hard to seat. I also seated some CCI and Federals just to make sure that it was the primers. The PMCs took a lot more pressure to bottom out in the primer pocket. Has anyone had this problem before?
     
  2. Charlie98

    Charlie98 Member

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    Interesting... I just picked up a tray of PMC LR primers yesterday in a trade... I'll be curious to see.

    It's unlikely it's anything but a slightly large primer... since you tried some of the others. Have you mic'ed one to see?
     
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  3. Captcurt

    Captcurt Member

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    Not yet, but I will.
     
  4. markr6754

    markr6754 Member

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    Interesting. I just had the exact same experience with TulAmmo primers. I put on muffs as I was certain one would go off. I'm wondering if there's a small difference in non_US manufactured primers that would be sized to metric spec. Just a stretch...but I also noticed that they (TulAmmo) primers won't feed properly on the press, which is why I switched to 100% hand priming.
     
  5. tightgroup tiger

    tightgroup tiger Member

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    Yes, there is a difference between metric and standard primers, but it's only about .0015". There is more difference with the hardness of the coil stock they punched the primer cups out of.
    We see the same thing with our domestic primers with Federal small pistol being the softest and CCIs being probably the hardest one.
    All metric primer cups are not as hard as the PMC and Tulla primers are.
    I have a 12k case of Fiocchi primers that are .0015" larger than my Winchester small pistol primers are and they seat easier than the Winchesters do in my domestic brass.
    I consider them the "Federal of the European primers". They run really well through my LNL-AP press, and my antique Lee Auto Prime ll that runs on top of my RockChucker. They burn clean, always go bang, and punch out easily without sticking to my punch pin.
    There is nothing not to like about them that I have found, except that I can't buy anymore of them.
     
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