I have found that 6.5 gr SR4756 serves well in 125 gr lead, 125 gr XTP, and 158 gr lead. This is sort of a 38 Spl +p load in a .357 case. I developed it for my Ruger SP101 3+", which is real unfriendly with true magnum loads. You can vary it from 6.0-7.0, but I liked the idea that one powder drop insert setting would serve all these options, including the 158 gr for my bigger guns (S&W 686-4 and Ruger GP100-5).
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