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The .25 ACP was designed because .25-caliber was the smallest John Browning could go while still retaining a centerfire primer pocket, which would be more reliable for self-defense than rimfire primers. As such, the .25 ACP allows for a very compact and lightweight gun, usually a semi-automatic pocket pistol. [4]
The Colt Model 1905 Marine Corps was a .38 revolver issued by the United States Marine Corps during the period from 1905 to 1909. It is a variation of the Colt M1892 with a rounded grip frame. A small number (less than 850) are known to have been issued under military contract.
The result from Colt was the Model 1905 and the new .45 ACP cartridge. The original round that passed the testing fired a 200-grain (13 g ) bullet at 900 ft/s (274 m/s), but after a number of rounds of revisions between Winchester Repeating Arms , Frankford Arsenal , and Union Metallic Cartridge , it ended up using a 230-grain (15 g) bullet ...
Colt Model 1908 Pocket Hammerless .380 ACP. Its serial number dates manufacture to 1919. This is a Colt US Armament reprise of the 1903 pocket model. It has all of the major updates except the magazine disconnector that was added in 1926. Dismounting for cleaning resembles the Colt .25 "Vest Pocket " Pistol of 1906 but is considerably easier.
Colt's advertising and marketing literature of the time highly touted the advanced safety features of the Model 1908, including a standard slide-locking safety catch, as well as a grip safety. In 1916 Colt engineer George Tansley invented a third safety feature for the pistol, the magazine safety disconnector , which prevented accidental firing ...
Later U.S. commercial loads in this caliber had factory standard ballistics of a 130-grain bullet at 1,040 ft/s (320 m/s) from the 4.5-inch (110 mm) barrel of the Colt 1903 Pocket Model. [3] With the United States Army Ordnance Corps favoring a return to a .45 caliber sidearm by the time the Colt autos in .38 ACP were introduced, the caliber ...
Colt has manufactured several self-loading pistols. The first was the Colt M1900 made from 1900 to 1902 exclusively for the .38 ACP. The Colt Model 1903 Pocket Hammer was manufactured for the same .38 ACP cartridge from 1902 to 1928. The M1905 military pistol was manufactured for the .45 ACP cartridge from 1905 to 1912.
The Luger on the other hand would be developed at about the same pace as the Colt 1902, the competition peaking in 1907 when .45 ACP Colt 1905's and 45 ACP Lugers faced off, although in the end both pistols showed insufficient promise in the heavier caliber, and as the United States was committed to the .45 ACP, the basic 1902 design stayed ...