Re: Accurate Data Powder 68?
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It better be good! A bud and I just split 32 lbs. It did quite well in my .300 shamu w/180s. Haven't got the full work-up in the .243, still going up. It looks to be just about a direct replacement for IMR 4831. That might change, depending on cartridge.
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Did you get it from Powder Valley? Also, care to share what your .300 Shamu is? How deep in E TX are you?