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.45 ACP loading questions

Discussion in 'Handloading and Reloading' started by Conservidave, Jun 15, 2013.

  1. Conservidave

    Conservidave Well-Known Member

    I just picked up around 500 .45 brass cases with small primer pockets, is there anything I need to know about reloading these other than needing small primers?
    Also, the pockets looked crimped on a bunch of them but I can't tell for sure, is it common for this type of round to have crimped pockets?

  2. arspeukinen

    arspeukinen Well-Known Member

    Use rifle primers (make sure your gun will reliably set them off) or small pistol magnum primers if you can find such. There is a BIG difference in powder burn between small and large primers in .45acp at least when usinh Vihtavuori powders. Hard to make "major pf" in ipsc using small primers.
  3. arspeukinen

    arspeukinen Well-Known Member

    Crimp is common. Either remove it by hand or use a priming tool that removes the crimp automatically (at least dillon 1050 can do it)
  4. steve4102

    steve4102 Well-Known Member

    I have noticed no difference in performance between 45 ACP loads with LP or SP primers. YMMV
  5. mike.h

    mike.h Well-Known Member

    me either. I've noticed no performance differences between LPP and SPP.
  6. mljdeckard

    mljdeckard Well-Known Member

    Nope. I set them aside and prime them with my 9mms, no difference at all.
  7. Hondo 60

    Hondo 60 Well-Known Member


    Military is crimped. I can't say that I've seen SPP in military rounds.
  8. mbopp

    mbopp Well-Known Member

    Somebody on another forum chrono'd SP and LP loads for a 45ACP. With identical powder charges the SP loads were 50-75 FPS slower.
    I find the SP cases give me a bit better accuracy though.
    The 45ACP cases used the LP primers so they could be run down the same production line as the M1 30-06 rounds.
  9. mdi

    mdi Well-Known Member

    When the progressive press fellers started yelling about small primer 45 ACP brass a few articles were written about them in the gun rags. I believe it was Handloader that ran a pretty extensive test with small vs. large primers in 45 ACP. Standard primers were used, not rifle nor magnum primers. The only difference in functioning, accuracy, velocity was a slightly lower muzzle velocity, mebbe 25 fps. using small primers, with identical powder loads. Everything else was identical. Over the last couple years the reports on various forums by reloaders say the same; no appreciable difference.
  10. Conservidave

    Conservidave Well-Known Member

    This is all good news now that I have a new source and supply for this brass, so I guess i'll be stocking up on the small primers too.

  11. arspeukinen

    arspeukinen Well-Known Member

    I say it again: using CBC cases, there is a very pronounced difference between LP and SP primers using Vihtavuori N320 or N340. Otherwise identical loads.

    In IPSC terms, with SP, the load falls under "minor pf", while with LP it makes major easily.
  12. TonyT

    TonyT Well-Known Member

    I only use mild loads with fast burning powders such as American Select, WST or Red Dot and have not seen any significant difference between SP and LP primers. You might see some velocity differences if you use the slow burning powders at near max loads.
  13. kerreckt

    kerreckt Well-Known Member

    I have chrono'd sp,sp mag. and lp primers in .45acp and there is no difference...at all. I have done this a number of times and always the same thing...no difference.
  14. mdi

    mdi Well-Known Member

    Hmmm. Have you tried any CBC cases with Vihtavuori powders, and rifle and magnum primers?
  15. the count

    the count Well-Known Member

    I hate .45 with small pistol primers...mess up my reloading setup.
  16. seastrike

    seastrike Active Member

    I save the sp for the unlikely case that I run out of lp primers. When I've shot them (using Win 231 and normal spp) I've noticed zero difference though I haven't chrony'd them.
    I've also used them for shoots where I don't want to pick up brass (idpa and such).
  17. tyeo098

    tyeo098 Well-Known Member

    I prime separately from my loading on my processive.

    When I feel a primer that wont go in 999 times out of 1000 its a SPP and goes aside.
    Prime it with my 9mm and chuck it in the primed 45 box.

    My 1911 doesn't care.
  18. moxie

    moxie Well-Known Member

    There are no crimped primers in currently produced .45ACP cartridges. Those with small primers are produced for training/range use only, not for operational use. The only reason for crimping handgun primer pockets is when the intended use for that cartridge is in submachine guns, where the rapid repeated recoil could loosen the primer. Such is not the case at all today as no U.S. .45 ACP subguns are in use, the last being the M-3, and that was a long time ago.
  19. Hk Dan

    Hk Dan Well-Known Member

    Oh for Christs sake! Those are WinNT brass and you dont need rifle primers or magnum primers. Standard will work fine. A 45 ACP has the ame powder charge as the 9mm and .40, and THEY use small primers. Its not like your trying to set off a 72 grain 300 winmag load or something.
  20. Conservidave

    Conservidave Well-Known Member

    "There are no crimped primers in currently produced .45ACP cartridges. Those with small primers are produced for training/range use only, not for operational use."

    It's my understanding these were training rounds from local law enforcement.

    I did prime 300 of these cases today and didn't have any issues except for the occasional tight squeeze with the primers. I plan on working up a large batch of Semi Wad cutters I've had sitti'n around for a while which will make good use for the brass and lead.


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