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The original round was a hand-made hollow-point bullet filled with No. 12 birdshot (0.05 in (1.3 mm)) with a flat polymer cap. [1] [2] To improve ballistic performance, a polymer-tipped round ball was introduced in 1987, and the current compressed core form was first sold in 1988.
Handgun bullets made entirely of lead have less penetration ability than jacketed bullets at similar velocity. In the 1930s, Western Cartridge Company introduced .38 Special ammunition capable of firing a 158-grain (10.2 g) copper-tipped lead-alloy bullet at 1,125 feet (343 m) per second to penetrate sheet-metal automobile doors. [4]
SWC rounds were developed to permit them to be loaded in either semi-automatic pistols or revolvers, where the rounded bullet shape often works better with feed ramps on semi-automatic pistols, and they are often used for heavy loads intended either for hunting or for self-defense. Some SWC bullet designs have a smaller diameter rear end ...
The 38/44 high-speed cartridge came in three bullet weights: 158 grains (10.2 g), 150 grains (9.7 g), and 110 grains (7.1 g), with either coated lead or steel jacket, metal-piercing bullets. The media attention gathered by the 38/44 and its ammunition eventually led Smith & Wesson to develop a completely new cartridge with a longer case length ...
The .380 ACP (Automatic Colt Pistol), also known as .380 Auto, .380 Automatic, or 9×17mm, is a rimless, straight-walled pistol cartridge that was developed by firearms designer John Moses Browning.
The case is necked out and trimmed off above the shoulder at a case-length of 1.700", with a COAL of 2.250", resulting in a "straight-wall" cartridge. It uses .4005" jacketed rifle bullets, and can accept bullets from .40 S&W and 10mm Auto pistols (135gr–230gr). 400 Legend : Proprietary. The rebated rim dimensions exactly match the 6.8mm ...