9mm vs 40 caliber: How the cartridges compare - Police1
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WebFeb 2, 2017 · Police Products. Ammunition. Doug Wyllie. Be Advised... 9mm vs. .40 caliber: How do the cartridges stack up? Smith & Wesson released the .40 S&W, and the new cartridge has gained traction, but the 9mm remains far more commonly used — here are some key differences. Feb 2, 2017.
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