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Old December 8, 2009, 10:35 PM   #4
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Join Date: November 1, 2008
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Posts: 1,333
Yep, thats W231. I believe they start as balls and then are crushed flat. All of the rifle powders I have used that are "ball" were actually ball, but not in the case of pistol powders. I suspect it is done to alter the burn rate on the powder. A large surface area flake should burn faster than a ball or sphere.
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