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No, they are entirely different cartridges even though they shoot the same diameter bullets. The 357 Magnum is a rimmed round designed for revolvers. The 357 SIG is a rimless round designed to feed and function through a pistol, and, with 125 grain JHP loads, duplicate the external ballistics of the same weight bullet fired in a 357 Magnum.
Ed C.
5 years ago
357Sig is a necked down 10mm. You want 357Magnum or 38Special.
Tom H.
5 years ago