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Reloading Question

Discussion in 'Handloading and Reloading' started by Gunner4h1r3, Sep 15, 2009.

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  1. Gunner4h1r3

    Gunner4h1r3 Member

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    OK, just got back from a deployment and did a quick inventory of what primers I have left. Found out I have a bunch of Small Pistol Magnum, but not a whole lot fo Small Pistol (which I use mainly for 9mm and .380). Is it possible to use the SPM primers in lieu of the SP primers?
     
  2. ranger335v

    ranger335v Member

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    Yes, but if i did it I'd back off on the normal charges a half grain or so.
     
  3. Gunner4h1r3

    Gunner4h1r3 Member

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    ok. so if I was running 4.7 grains of HP38 with a 115 grain 9mm FMJ, back it down to 4.0-4.2?
     
  4. loadedround

    loadedround Member

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    According to my Hodgdon Manual, 5.1 gr is the max load for HP38/115 gr/fmc bullet. Your load is quite a bit below that and I would first try a few rounds with the magnum primers paying close attention to the usual pressure signs. I would venture a guess that you will see little or no difference except to increase your velocity about 50 fps or so. Good shooting! :)
     
  5. Taildragger-J3

    Taildragger-J3 Member

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    This is interesting. I HEARD (never believe everything you hear) that using a Mag primer shouldn't affect the load. It just gave a more consistent "light off" to the round than standard primers. I've been using Mag primers because that's what I was able to get. Thanks for the update.
     
  6. rcmodel

    rcmodel Member in memoriam

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  7. ranger335v

    ranger335v Member

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    ".. a Mag primer shouldn't affect the load. It just gave a more consistent "light off" to the round than standard primers."

    Yeah, "Use a hotter primer for better igniton!", that's a poplular misconception. If it were true we would all be using nothing BUI mag primers.
     
  8. rcmodel

    rcmodel Member in memoriam

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    Exactly right.

    Most non-magnum pistol calibers give worse Standard Deviation with magnum primers then with standard primers.

    Too much of a good thing, so to speak.

    Use them if you must during the current primer shortage.
    But it's always best to use the right primer for the job if you have a choice in the matter.

    rc
     
  9. ArchAngelCD

    ArchAngelCD Member

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    Welcome home Gunner4h1r3, thank you for your service...

    Like said above, with the charge you are using I doubt any change in charge will be necessary. I've also found using a Magnum primer with W231 to be less efficient but hey, you use what you have when times are tough...
     
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