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Old November 18, 2012, 07:48 PM   #4
mehavey
Senior Member
 
Join Date: June 17, 2010
Location: Virginia
Posts: 6,869
QuickLoad tells me they are not the same:

Equal weights (41.7gr) in a 308 behind a 168 SMK
AA-4064: 43,800psi/2,435fps
IMR4064: 49,000psi/2,470fps


Burn characteristics are different across the board:


ALSO (big also), Accurate is constantly getting their powders from different sources. Take extra care even changing lots.
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