Just found this thread...a cpl of thoughts...Old Unique burns dirty in everything I've tried it in...hand gun, rifle (.32-20, .44-40, .44 Magnum), and 12, 16, and 20 ga. shotgun.

New Unique (burns a little faster than the old lots I have on hand.) is a smidge cleaner but neither measures worth a c..p through an RCBS Uniflow or Dillon 550B measures.

I've had equal grouping from Win 231 or HP-38 (virtually the same powder according to my chronograph) and either measures infinitely better.

Rodfac

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