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Old 10-21-2011, 10:06 PM
GyMac GyMac is offline
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Join Date: Jun 2009
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There is so much variation in the published data for Win 231/HP-38. And then there's what people get on their chronographs. My Speer Number 11 shows Win 231 4.0 - 4.4 grains with a 158 grain bullet producing 792 and 878 FPS, respectively.
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