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Large pistol primers vs small in 45 ACP ?

Discussion in 'Ammo & Reloading' started by Hangfire, May 11, 2019.

  1. Hangfire

    Hangfire Sharpshooter

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    I've got around 200 pcs. of once fired, resized and tumbled Federal Champion 45 ACP brass that has the small pistol primer pockets......since I always seem to be unable to find a few cases after firing on the range I figured I'd just reload them till they all slowly disappeared. :)

    I'm not opposed to using the SP primers for 45 ACP but I just wondered for those that have did you use the same powder charge as you do when using LP primers and was there any noticeable difference in the accuracy, POI or velocity that you could tell ?

    If it matters I'll be using W231 powder and 230 gr. FMJ ball bullets in a M1911.
     
    Last edited: May 11, 2019
  2. Ignored Member

    Ignored Member Sharpshooter

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    Use the same specs that you normally reload.
     
  3. Mad Professor

    Mad Professor Sharpshooter

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    I could not tell a difference in the testing I did on a chronograph with both. I actually prefer the small primers so I don’t have to change my press over.
     
  4. Cat City Slim

    Cat City Slim Marksman

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    I load all sp 45 auto. I typically see about 20 fps slower velocity with the small primers. If that bothers you, you can use sp magnum primers and you shouldn't see any difference in velocity.
     
  5. Aries

    Aries Sharpshooter

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    I've used both and couldn't tell any difference.
     
  6. swampratt

    swampratt Sharpshooter

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    When i was testing them small vs large in 45acp I used all the same head stamp and found less variation in velocity with the small primer. But just a little.
    I used bullseye powder and cast 200gr bullets.
    On paper though I could not tell any difference.
     
  7. Hangfire

    Hangfire Sharpshooter

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    Thanks for the replies fellas......I'll go ahead use the same powder charge with the small pistol primers.
     
  8. Fyrtwuck

    Fyrtwuck Sharpshooter

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    I load and shoot it all the time. I don’t have to change the primer assembly on my 650 and it’s fun to listen to people cussing when they pick up my brass and see that it’s SP 45.

    Almost as much as fun as watching people pick up 45 GAP brass and realizing it isn’t ACP.
     
    Mad Professor likes this.
  9. dennishoddy

    dennishoddy Sharpshooter

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    Whoever brought the insane idea of SP .45 ACP brass needs to be tarred and feathered, then ran out of town on a rail.
    I throw the SP in the brass scrap bucket to be disposed of properly.
     

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