or the later-developed Caliber .38 Special, Ball, PGU-12/B High Velocity cartridge. The M41 was a low pressure cartridge rated at 13,000 psi (90 MPa), originally designed for 158 grain (10.2g) ball ammunition, but loaded with a 130 grain (8.4g) FMJ bullet. The PGU-12/B, issued only by the U.S. Air Force, had a greatly increased maximum allowable pressure rating of 20,000 psi (138 MPa), which was sufficient to propel the 130 grain (8.4g) FMJ bullet at from a test barrel, and from a revolver barrel. The S&W Model 15 revolvers were replaced by the Beretta M9 pistol in 9×19mm caliber beginning in 1985, with complete turnover by the early 1990s. In addition to military use, the Model 15 was issued by many police departments across the United States as well as various federal law enforcement agencies. In 1972 S&W produced a stainless steel version of the Model 15 which it termed the Model 67. Users The LAPD's Model 15 revolvers (and department issued Model 36 5-shot, 2-inch barrelled snub nose Smith & Wesson revolvers for detectives, plainclothes, undercover and other officers' off duty carry) were modified to be fired double-action only. This was accomplished by the department armorer who ground the full cock notch from the hammers. Officers were then trained to shoot combat style without ever cocking the weapons. This change was likely the result of unintended injuries and/or property damage, and of litigation against the LAPD after officers had cocked their weapons only to have them discharge inadvertently, possibly as a result of physical attacks or having been startled in the course of searching for suspects. In lawsuits, the principle of res ipsa loquitur was easily affirmed because "an inadvertent weapon discharge is a negligent discharge". Overland Park Police Department (Kansas) used the revolver before going to semi-automatic Beretta 92 pistols. The Florida Department of Corrections used the Model 15 until it was replaced by the Smith & Wesson M&P. See also The Model 10 Military & Police (cornerstone of the S&W .38 Special line of revolvers) The Model 14 Target Masterpiece (6" barrel predecessor to the Model 15) The Model 18 Combat Masterpiece (.22 caliber version of the Model 15) The Model 19 Combat Magnum (.357 magnum version of the model 15) The Model 67, the stainless steel version of the Model 15 References External links Smith & Wesson Model 15 Classic Product Page Smith & Wesson "Military