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  2. Transitional ballistics - Wikipedia

    en.wikipedia.org/wiki/Transitional_ballistics

    Transitional ballistics is a complex field that involves a number of variables that are not fully understood; therefore, it is not an exact science. [6] When the bullet reaches the muzzle of the barrel, the escaping gases are still, in many cases, at hundreds of atmospheres of pressure. [3] Once the bullet exits the barrel, breaking the seal ...

  3. Taylor knock-out factor - Wikipedia

    en.wikipedia.org/wiki/Taylor_knock-out_factor

    The Taylor knock-out factor, also called Taylor KO factor or TKOF, is a formulaic mathematical approach for evaluating the stopping power of hunting cartridges, developed by John "Pondoro" Taylor in the middle of the 20th century. Taylor, an elephant hunter and author who wrote two books about rifles and cartridges for African hunting, devised ...

  4. Internal ballistics - Wikipedia

    en.wikipedia.org/wiki/Internal_ballistics

    Internal ballistics (also interior ballistics), a subfield of ballistics, is the study of the propulsion of a projectile. In guns, internal ballistics covers the time from the propellant 's ignition until the projectile exits the gun barrel. [1] The study of internal ballistics is important to designers and users of firearms of all types, from ...

  5. 5.56×45mm NATO - Wikipedia

    en.wikipedia.org/wiki/5.56×45mm_NATO

    Using a ballistic calculator, they determined that a 55-grain bullet would have to be fired at 3,300 ft/s (1,006 m/s) to achieve the 500-yard performance necessary. [5] Robert Hutton (technical editor of Guns & Ammo magazine) started development of a powder load to reach the 3,300 ft/s (1,006 m/s) goal. He used DuPont IMR4198, IMR3031, and an ...

  6. Terminal ballistics - Wikipedia

    en.wikipedia.org/wiki/Terminal_ballistics

    A larger diameter bullet also means more space is required to store the ammunition, which means either bulkier guns or smaller magazine capacities. The common trade-off when comparing .45 ACP, .40 S&W, and 9×19mm pistols is a 7- to 14-round capacity in the .45 ACP vs. a 10- to 16-round capacity in the .40 S&W vs. a 13- to 19-round capacity in ...

  7. Magazine (firearms) - Wikipedia

    en.wikipedia.org/wiki/Magazine_(firearms)

    Magazine (firearms) A staggered-column 9×19mm Browning Hi-Power pistol box magazine. The top image shows the magazine loaded and ready for use, while the lower image shows it unloaded and disassembled. Loading of small arms ammunition into a magazine. A magazine, often simply called a mag, is an ammunition storage and feeding device for a ...

  8. .270 Winchester Short Magnum - Wikipedia

    en.wikipedia.org/wiki/.270_Winchester_Short_Magnum

    The 270 Winchester Short Magnum or 270 WSM is a short magnum cartridge created by necking down the .300 Winchester Short Magnum and fitting it with a .277 caliber bullet. The correct name for the cartridge, as listed by the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), is 270 WSM, without a decimal point. [3]

  9. .260 Remington - Wikipedia

    en.wikipedia.org/wiki/.260_Remington

    What the 6.5-08 provided over the .243 Winchester, .308 Winchester, and to a lesser degree the 7mm-08 Remington was bullets with excellent ballistic coefficients and sectional densities. Since the 6.5-08 was a wildcat cartridge, variations existed between cartridge chambers depending on the reamer used to cut the chamber.

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