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.380 ACP
Test barrel length: 3.75 inches (95.3 mm)Sources: Federal CartridgeBuffalo Bore AmmunitionRBCD Performance Plus AmmunitionNorma AmmunitionThe .380 ACP (Automatic Colt Pistol), also known as .380 Auto, .380 Automatic, or 9×17mm, is a rimless, straight-walled pistolcartridge that was developed by firearms designer John Moses Browning.
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