Awfully fast powder for .44 Mag, even for reduced loads. Should work in .44 Spl. Should be fine in .380.
Lots of my stuff is packed/covered right now, but I have Winchester data that shows WST in a few calibers. I'll check later today when I start getting everything back in place. (Wife wanted new windows, so I moved, packed up, and covered most everything in the man cave)
I could not come up with any either, but it would work in .380 & .44 Spl. Too bad you can't find data, it's a good powder. Very similar to Ramshot's Competition.
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