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AA#7 / low pressure loads

Discussion in 'Handloading and Reloading' started by moooose102, Apr 16, 2009.

  1. moooose102

    moooose102 Senior Member

    Joined:
    Oct 21, 2007
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    3,024
    Location:
    West Michigan
    has anybody else noticed aa#7 being very dirty (lots of residue in the barrel) when using it for low presure or beginning loads?
     
  2. rcmodel

    rcmodel Member in memoriam

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    Eastern KS
    NO, but it would be dirty at low pressure.
    Thats why they make fast powder.

    Any medium to slow powder will not burn clean at low pressure.
    AA #7 is similiar to Blue Dot in burn rate, and is normally used in higher pressure rounds like full power 9mm and .357 / .44 Magnum mid-level loads.

    If you want light loads, use faster powder.

    rc
     
  3. Ben Shepherd

    Ben Shepherd Senior Member

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    Feb 27, 2004
    Messages:
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    Location:
    Utah
    Rc's got it.

    If you're just wanting a load that follows the bottom of the AA7 load data, try switching over to AA5 and work up to the velocity you want(within listed data of course). Maybe even AA2.

    A couple things to check if the above is not the case-

    1. How's your neck tension? Slugs and the inside of the brass at the correct diameters?

    2. Crimp. AA7 is a relatively slow pistol powder, and preforms best with a good crimp.
     
    Last edited: Apr 16, 2009

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