One thing to keep in mind:
Unique will be quite dirty in low pressure loads.
From a cleanliness standpoint, alone, it is probably the worst choice.
(Even though Alliant Unique is much cleaner than the old Hercules Unique.)
I like Unique, but it's a dirty powder unless you get the pressures up.
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Don't even try it. It's even worse than the internet would lead you to believe.
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