40 s&w ammo for sale the 40 S&W (10×22mm Smith & Wesson) 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 Bureauof Investigation’s reduced-velocity 10mm Auto cartridge which could be retrofitted into medium-frame (9mm size) automatic handguns. The biggest difference is size: .40 S&W is noticeably larger than 9mm Luger ammo and has a wider bullet and neck diameter 40 s&w ammo for sale.
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