The .40 S&W was developed 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 (9 mm size) semi-automatic handguns.

Dec 2, 2021 · Pistols chambered in .40 S&W, a pressure-reduced version of the 10mm and one-time go-to for law enforcement, can now be readily found at bargain prices.

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May 29, 2024 · While 9mm might reign supreme, there are still some fantastic .40 S&W guns out there and more than a few reasons to invest in .40 S&W. We gathered some of the best .40 …

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Sep 27, 2024 · While “big bore” calibers like the spicy 10mm and the iconic .45ACP needed large framed semi-autos to accommodate it, the .40 S&W was just small enough that many 9mm …

Jan 31, 2021 · The .40 S&W strikes a solid balance between energy and magazine capacity. The .40 S&W was specifically developed to duplicate the performance of the FBI’s reduced-velocity 10mm cartridge and fit into medium-frame (9mm size) automatic handguns.

Feb 22, 2025 · Why? Nothing changed about the .40 S&W. The improvements in bullet technology developed to improve the 9 mm can also be applied to the .40—with good effect.