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Can anyone help me identify a powder, or point me in the right direction.  I have 12 pounds and would like to use it if possible.  The keg had written in magic marker AA 205.  I have contacted Accurate Arms and they say is not a one of their powder numbers.  The grains are 2 different colors, light gray and dark gray, they are not ball, nor flake nor cylinderal.  They are all about the same size, more round, than anything else but with an odd shape with  a rough surface.   I will not use it until I can positively IDENTIFY it. I enjoy reading the posts on this site.  I have learned a lot.
 

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I have identified this powder as Win. AA20S, it was made in
the late 1960s for reloading shotgun. The burning rate puts it between AL-7 and AL-8 according to an artical in "Propellant Profiles" by Wolff Publishing. I would like to use it for reloading pistol, most any cal. Does anyone have any data for AA20S. I have data for shotgun.
 
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