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Thread: 45 acp primer question

  1. #1

    45 acp primer question

    First off, Iím not sure this question belongs here, but here goes.
    Is there an advantage or disadvantage to spp in a 45 acp ? Both spp and lpp are listed for this case and that caused me to wonder.

    Thanks in advance for sharing you ur knowledge.

  2. #2
    Boolit Master



    Finster101's Avatar
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    The only advantage I can see is being able to use whichever size primer you have the most of right now since replacing them is difficult.

  3. #3
    Boolit Master


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    a while back some companies made spp 45 and for most relaoders it was a pita.

    In practice.. either work.. but I tend to prefer large primers in large cases.. even if the case volume is or isn't filled.

  4. #4
    Boolit Grand Master Outpost75's Avatar
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    The small primer pocket results in a stronger case if you are going to load above factory specs for a Ruger revolver or .45 Super.
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  5. #5
    AKA: GRMPS Conditor22's Avatar
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    I read somewhere that SPP were cleaner for indoor shooting

  6. #6
    Boolit Master


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    I use SP, SR, LP or LR depending on what I shootings. Also use Star 45 plus P brass in revolvers.

  7. #7
    Boolit Master


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    With the understanding that my research and memory are not exhaustive, I believe spp 45acp were developed to use the "green" primers. Many reloaders, 'specially those using progressive presses, find them a pita. Generally side by side tests do not disclose significant differences.
    As mentioned, primer availability, and special applications may warrant their use.
    Last edited by William Yanda; 06-21-2021 at 03:44 PM. Reason: grammer
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  8. #8
    Thanks First r all your input. I have some spp, so that is what I’ll use.

  9. #9
    Damn spell check, should be for all, not First r

  10. #10
    I have both and always gravitate to the large. Just easier to work with. Just save yourself some hassle and don't shoot large and small together to avoid the extra sorting. Drives me nuts and I inevitably miss a few and crush primers in the press if I'm not careful.

  11. #11
    Boolit Master
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    Recently I’ve been loading both spp and LPP in 45acp, testing both over chronograph. All being same powder 4.8 gr bullseye, cast boolits 200 gr. same CZ97 pistol run around 850 fps. Only difference was using LPP magnum jumped about 75 - 100 fps. So you might want to cut powder some with magnum primers.
    "The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government..... When the people fear their government there is tyranny, when the government fears the people, there is liberty." Thomas Jefferson

  12. #12
    Boolit Master
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    Biggest advantage is not having to change the primer system on the press. Biggest disadvantage is sorting them out.

  13. #13
    Boolit Grand Master tazman's Avatar
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    Some time back, match target shooters claimed better accuracy with SPP. Something about less bullet jump due to the primer before the powder fully ignites.
    I can't confirm or deny this. I am not a good enough shot to tell if there is a difference in accuracy.

  14. #14
    Boolit Bub Coyote3's Avatar
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    I don’t know about any advantages, but I convert the spp cases for my .400 Corbon.

  15. #15
    Boolit Master scattershot's Avatar
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    I have used both, and I canít see any difference. Just be sure to separate them before you start loading..
    "Experience is a series of non-fatal mistakes"


    Disarming is a mistake free people only get to make once...

  16. #16
    Boolit Buddy
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    Quote Originally Posted by Seitz 555 View Post
    First off, I’m not sure this question belongs here, but here goes.
    Is there an advantage or disadvantage to spp in a 45 acp ? Both spp and lpp are listed for this case and that caused me to wonder.

    Thanks in advance for sharing you ur knowledge.
    That is good if the case is sp.

  17. #17
    Boolit Buddy
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    I shot 45 acp with large primers for about 30 years. About 10 years ago I got three five gallon buckets of 45acp small primer brass for nearly free. I shot all the old rounds and left those at the range. I only use the spp brass now and that works great for me.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check