Another great powder for light loads in the .357 Mag is HP-38, offered by Hodgdon. I use .357 brass, CCI small pistol primers, 158 grain RNFP lead bullets and 4.0 grains of the HP-38. It burns clean, shoots point of aim at 25 yards with every Ruger Vaquero I have shot it in (3 of my own and 2 owned by a friend). The recoil and report is about like a .22 mag. I have used this load for 3 years in CAS and really like it. Odessa
I use 4.0 gr. of Winchester 231 with a 158 SWC or the Lyman 358665 FN (164 gr. with wheelweight metal + 2% tin) in .38 Special brass. The cylinder does need a good scrubbing after a couple of hundred rounds. Otherwise it's built up too much to chamber .357 cases. Win. 231 is said to be the same powder as HP38, so buy by price. The kids in firearm safety love it. More noise than the .22 but not as intimidating as the .45 Auto.
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