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AA#7 / low pressure loads

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

  1. moooose102

    moooose102 New Member

    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

    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.

  3. Ben Shepherd

    Ben Shepherd New Member

    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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