I ran a few 357 with Sport Pistol today with pleasing results. The cases were clean on the outside and mildly sooty inside. Used the Alliant data to the tee and came down approximately 10%. Ran 25 cartridges at 5.8 and 6.2 grains each with a medium roll crimp at 1.607" COAL using Bayou Bullets coated 158 SWC's. They weren't whimpy on recoil but somewhere in the middle. The data says ~1,000ish fps. I did see high pressure signs at 6.2 grains with a heavy crimp on the 6 I fired and tossed those cases in the scrap bin. Lots of good potential with this powder and I concur with the others that say it's near W-231 but cleaner and meters great. See below.
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Top row of cases you can see the primer flowing around the firing pin. Not good.
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There is a wealth of knowledge here to gain and is wonderful to learn from those with experience and a willingness to lend helping hand. Crimp on some plated Xtreme by degrees of rotation from removing the bcase mouth bell on my Lee FCD for my Classic Turret. I had a hand in figuring it out from these fine gals/gents here. See below.
(Don't mind the simulated cannelure on these bullets. They were not fully seated, but I was setting up the amount of crimp and pulled them after.)
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