9×23mm Winchester
Pistol cartridge designed by John Ricco and Anthony Valdez
9×23mm Winchester
The 9×23mm Winchester is a pistol cartridge developed as a joint venture by Winchester Ammunition and Colt's Manufacturing Company. The 9×23mm Winchester has a convoluted development history, but was commercially introduced by Winchester in 1996. Marketed primarily to competition shooters as a replacement for .38 Super for International Practical Shooting Confederation, United States Practical Shooting Association and International Defensive Pistol Association competition, the cartridge failed to find significant market success despite a high-profile introduction. The critical design feature of the 9×23mm Winchester is a much-strengthened case that does away with the semi-rimmed case design of the .38 Super which sometimes caused feeding problems. In contrast to the maximum pressure of 36,500 psi for the .38 Super, the 9×23mm Winchester can operate under a higher internal pressure of 55,000 psi (measured with a piezoelectric transducer). It has a slightly tapered but nearly parallel case...
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