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Old October 1, 2011, 07:24 AM   #18
cdoc42
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Join Date: March 13, 2005
Location: Pennsylvania
Posts: 1,674
Is it also true that burn rates differ from lot to lot in the same powder? That would explain, if it's correct. that cartridge manufacturers load by pressure, not velocity, so they can be more certain pressures are not exceeded. As handloaders we use velocity as a guide which may produce different results from lot to lot if the pressures change enough.-?
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