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10mm Auto Ammo

Originally released in 1983, the 10mm cartridge is a rimless pistol cartridge developed by Jeff Cooper and Norma® Precision ammunition for the Federal Bureau of Investigation (FBI) to replace the standard-issue .38 Spl revolver cartridge. The 10mm cartridge was later decommissioned by the FBI after the Firearms Training Unit concluded that its recoil was difficult to control while maintaining accuracy and that the pistols chambered for the cartridge were too large for some small-handed individuals. These issues led to the creation of and following replacement by a shorter version of the 10mm, known today as the .40 S&W. 

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