Little slow and dirty for the SPL but works fine; good for nearly full throttle in the .357. Meters well, is pretty dense as pistol powders go. It's about one tick slower than Herco in straight wall cases. I would recommend True Blue as an all-purpose pistol/revolver powder, it's right there with HS-6 but even better on the low end (dirty but very accurate) and meters just about like water....meaning it will find all the leaks in your powder measure.