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Old January 27, 2013, 09:18 PM   #2
Art Eatman
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Join Date: November 13, 1998
Location: Terlingua, TX, USA
Posts: 22,601
Interesting. The rule of thumb has been that the shorties use 15 or 20 percent less powder than the big brothers, but lose only 10 percent on muzzle velocity.
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