Primers

Discussion in 'Handloading and Reloading' started by Cookie223, Apr 5, 2021.

  1. Cookie223

    Cookie223 Member

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    New to this forum, and looking forward to exchanging information.
    My question is, can I safely use small pistol/magnum primers in standard 9mm?
    Thanks
     
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  2. Blue68f100

    Blue68f100 Member

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    Welcome to THR

    That question has been asked many times in the last year. The answer is YES provided your not at MAX load. Best to drop back a couple of tents then work back up. Some striker fire pistols have problem setting them off. Just need to test in yours.
     
  3. EricBu

    EricBu Member

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    I use nothing but small pistol magnum anymore in any small pistol I load. After tons of testing....there is virtually no variance between them on the chrony. The only issue that I've ever had is that some guns can't punch the harder cup...the only ones I've had a problem with are a few striker fired guns. All my "hammer" guns work fine. It's a lot easier to keep a good supply of one type of small pistol. That's my experience, your mileage will vary..........but I quit buying standard small pistol after my 2nd primer shortage....so I'd say I've been using 100% small pistol magnum for about 15 years now. That's in .32 ACP, 9mm, and 38 SPC. I do the same with large pistol, and small rifle. The only issue I've had with small rifle, my CZ527 in 300BLK would not punch a magnum primer to save it's life, but it also had a ton of problems and CZ ended up replacing the gun completely under warranty. I still keep both Large Rifle and Large Rifle Magnum on hand, but I don't worry so much about keeping 10 or 20K primers on hand for that, so it's not a big deal.
     
  4. milsurpguy

    milsurpguy member

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    You would have to carefully work up the load using small magnum primers, at least that's how I woud do it. Do you have a chronograph?
    In my speer manual there is a passage waning about replacing magnum and regular primers in pistol. They say according to their testing they would see 5,000 psi higher pressure in small case volume round such as 9mm when the primers were switched to mags.

    Only striker fired gun I have is the semiauto sten and it punches the heck out of the small rifle primers I use to load my special ludicrous hot sten only 9mm ammo.
     
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  5. Trent

    Trent Member

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    The pressure curve (depending on barrel, projectile, etc) can change fairly abruptly, so definitely start back at minimum load and work up again. Pull the stops when you are seeing signs of overpressure (flattened primers and/or cratering), and if things were going well on the step prior, settle back a notch.
     
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  6. Cookie223

    Cookie223 Member

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    Thanks everyone.
    Just wanted to play it safe.
    I don’t load to max, and I don’t own a chronograph (you would think I would) a friend had one and he recently moved.
     
  7. Walkalong

    Walkalong Moderator Staff Member

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  8. Cookie223

    Cookie223 Member

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    stillquietvoice and Walkalong like this.
  9. stillquietvoice
    • Contributing Member

    stillquietvoice Contributing Member

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    @Cookie223 welcome to the forum. Since your question has been answered I won't extrapolate any farther.
     
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