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The "original" 357 mag load was a nickle winchester case, 158 gr. SWC, small rifle primer and 15.8 grains of 2400. the idea was the rifle primer was stronger, to handle the high pressure level(40,000+ cpu).
WARNING: Do not use this load in a lightweight/weak gun.
I shoot these in nothing weaker than a GP100.
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From my cold dead hands.........
NRA certified rifle, pistol and shotgun instructor.
Hunter education instructor
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