What Sevens says about Unique and it's metering issues is true, but I've learned to adjust my loading technique to accomodate it. I do, in fact, load 4.0 & 4.2grn charges of Unique into my .380 loads using my Hornady powder measure, I just tap the handle to settle the powder before rotating the measure and everything comes out fine. Originally, I had a Lee Perfect Powder measure and I coud not sucessfully meter small charges of Unique, and I gave up with it and got the Hornady, so much may depend on what you are using.
I've actually just got back into the 9mm reloading game, and I have been experimenting with W231 & WST in some of my other rounds, certainly I will be giving W231 a try in the 9mm.
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