![]() ![]() 38 ACP but utilizes a smaller case and higher pressures.īrowning himself was not done with 9 mm cartridges and introduced the 9mm Browning Long in 1903 and the. This cartridge is ballistically similar to the. Įurope would eventually favor the 9×19mm Parabellum cartridge. Some Astra 400 pistols were stamped "9M/M&38" on the barrel, denoting that the barrel was specifically designed to chamber both 9mm Largo and. 38 ACP was semi-rimmed and slightly shorter than the rimless 9mm Largo. If your bullet is traveling slower than the speed of sound (1,100fps), then it won’t break the sound barrier and produce the sonic crack associated with traditional gunfire. That slower speed is the key to the effectiveness of subsonic ammo. 38 ACP ammunition enjoyed a modest spike during the surplus gun boom of the 1950s, 1960s, and 1970s since the cartridges would usually cycle in Spanish surplus pistols like the Astra 400 that were chambered for the 9×23mm Largo, despite the fact that the. This serves two purposes: it retains more energy while also slowing the bullet’s speed. 38 ACP loaded back to its original ballistics. 38 Super, which was little more than the. However, they did see small but steady sales up until the introduction of the more powerful. 38 ACP were introduced, the caliber never gained much popularity. 45 caliber sidearm by the time the Colt autos in. With Army Ordnance favoring a return to a. 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. Comparatively speaking, the Hornady V-Max is a supersonic round with. Pollard, writing in Automatic Pistols in 1920, gives Winchester factory ballistics for a 130-grain bullet at 1,175 ft/s (358 m/s) muzzle velocity and 398-foot-pound-force (540 J) of muzzle energy for Ely ammo, the figures for a 128-grain bullet were 1,100 ft/s (340 m/s) and 344-foot-pound-force (466 J) and for Kynoch a 130-grain bullet 1,000 ft/s (300 m/s). The 300 BLK variation has a muzzle velocity of 1,050 fps and 465 ft-lbs of muzzle energy. Subsequent commercial loadings varied considerably in power. However, these ballistics proved too violent for the Colt Model 1900 pistol, and velocities were soon lowered to below 1,200 ft/s (370 m/s). Reported ballistics for the first commercial loads were a 130-grain bullet at 1,260 ft/s (380 m/s), and some experimental loads ran as high as 1,350 ft/s (410 m/s). Initial loadings of this cartridge were quite powerful. The metric designation for the round is 9×23mm SR (semi-rimmed), which is not to be confused with other 9×23mm cartridges. It was first used in Colt's Model 1897 prototype, which he did not produce. 38 Auto or 9x23mmSR, is a semi-rimmed pistol cartridge that was introduced at the turn of the 20th century for the John Browning-designed Colt M1900. 38 ACP ( Automatic Colt Pistol), also known as the.
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