Thread: .357 Magnum Factory Duplication Load
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Old 06-26-2011, 08:10 PM
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Winchester and Remington report a velocity of 1235 fps from their 158gr JHP/JSP .357 Magnum ammo.

I have clocked a Remington 158gr FMJ bullet from a charge of 16.4gr W296 using a CCI-550 primer at 1158 fps from a 4" barrel. That load might equal the factory ammo because I'm not sure what length barrel is being used with the factory ammo data although Remington claims it's from a 4" barrel. Hodgdon says you can charge as much as 16.7gr W296 and other sources go as high as 17.0gr H110. I'm guessing the additional powder might get you close. Using Lil'Gun will probably get you there easier but that powder might have problems of it's own when used in a revolver.
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