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100 gr vs 150 gr 777
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October 24, 2009, 04:52 PM
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sourdough44
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Join Date: October 17, 2007
Location: WI
Posts: 621
120 grns of Blackhorn 209 gives 1950 fps with my Knight & a 250 grn SST. I would not go above 120 with any loose powder/substitute. I don't really need to use 120 & may drop it down some.
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