r/40SmithandWesson

249 archived posts · May 2018 – Sep 2026

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.40 S&W

r/40SmithandWesson

For fans of the .40 Smith and Wesson cartridge. Or not.

Created May 23, 2018

879Members (last snapshot)

249Archived posts

The .40 S&W (10×22mm Smith & Wesson in unofficial metric notation) is a rimless pistol cartridge developed jointly by major American firearms manufacturers Smith & Wesson and Winchester. The .40 S&W was developed from the ground up as a law enforcement cartridge designed to duplicate performance of the Federal Bureau of Investigation's (FBI) reduced-velocity 10mm Auto cartridge which could be retrofitted into medium-frame (9mm size) semi-automatic handguns. It uses 0.40-inch (10 mm) diameter bullets ranging in weight from 105 to 200 grains (6.8 to 13.0 g). Continue reading the Wiki here.

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