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Old November 18, 2012, 10:26 PM   #7
FrankenMauser
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Join Date: August 25, 2008
Location: In the valley above the plain
Posts: 13,403
Even if they have been coming from the same place lately (I don't believe so), the granules are different - which changes burn characteristics.

AA4064 granules are approximately 0.055" long and 0.040" in diameter.
IMR4064 granules are approximately 0.080" long and 0.033" in diameter.

Different powders.
Treat them as such.
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