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Old June 19, 2012, 05:42 PM   #4
zxcvbob
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Join Date: December 20, 2007
Location: S.E. Minnesota
Posts: 4,720
8.0 grains of Herco would do it, but that's not a light load! 7.5 grains of Unique would be about equivalent -- so try about 6.5 grains of Unique and work your way *down*.

You're going to have trouble getting the velocity down to 1000. It's an efficient little cartridge.
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