Triple 7. It’s the only energetic powder other than BH209, which I might try if a percussion cap could ignite it as you can’t get 209 nipples for revolvers.
I’ve seen energetic numbers for Pyrodex. But I’ve seen many more that aren’t. And I don’t like the fouling as it has a sticky quality. And I don’t like how fast it begins to corrode.
But I typically buy 3 lbs at a time and get Olde Eynsford black powder through the mail.
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