Are you talking a factory duplicate load from say the 1930's-1940's when the 158 grain JSP was much hotter than now, or a current load? There is a difference. What gun are you going to be shooting this in? (I wouldn't want to try one of those early .357 loads in a little J-frame jst because of the recoil)

I know in the November 1935 American Rifleman Elmer wrote that with 15.4 grains of 2400 and a 158 grain bullet he duplicated the factory load with a velocity of 1518 fps. I'm sure 2400 is better burning than in those days, and I wouldn't dream of using that listed load AND NEITHER SHOULD ANYONE ELSE! I can tell you that my .38-44 loads in my Outdoorsman are duplicating today's .357 loads and then some in .38 +P cases.

For my current loads, I use a Lyman #358156 cast bullet and 12.5-13.0 grains of 2400, and that should cover all of your needs. They do pretty well in my 27-2.

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