What handgun cartridge designed by John Browning in 1905, for use in his prototype Colt semi-automatic pistol, is chambered in a third-generation semi-automatic pistol from Smith & Wesson's 4500 series of handguns?
.45 ACP The .45 ACP (Automatic Colt Pistol), or .45 Auto (11.43×23mm) is a handgun cartridge designed by John Browning in 1905, for use in his prototype Colt semi-automatic pistol. After successful military trials it was adopted, along with the Browning .45 Colt handgun, as the .45 M1911 cartridge. The handgun was designated M1911 pistol.
Sport pistol A sport pistol or standard pistol is a type of handgun used in several shooting sports, including the Olympic 25 metre pistol event and 25 metre standard pistol. Since 2005, the 25 metre rapid fire pistol rules also require the use of sport pistols, with a few extra requirements. Other sports to make use of this gun are women's 25 metre military rapid fire pistol, bullseye (in one of its three stages), and a variety of other national shooting sports.