Classified as .32 S&W Long for revolver (could also be Short, in which case the nomenclature, I believe, is .32 S&W). Generally an unjacketed lead bullet with a rimmed cartridge, while for pistol it is .32 ACP. The bullets are usually copper or cupro-nickel jacketed and the cartridge is rimless. The rimmed/ rimless affair is basically designed for the extraction process in both types of firearms due to their differing operational mechanisms.
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