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The .345 Winchester Self-Loading (.345 WSL / .345 Winchester Machine Rifle) or 8.8x34mm WSL is a rimless, rifle cartridge in a "cylindrical" shape, created in 1917 by the
Winchester Repeating Arms Company The Winchester Repeating Arms Company was a prominent American manufacturer of repeating firearms and ammunition. The firm was established in 1866 by Oliver Winchester and was located in New Haven, Connecticut. The firm went into receivership ...
. It was designed by Frank F. Burton for the Winchester-Burton Machine Rifle, also known as the Winchester Model 1917. While few original documents pertaining to the rifle have survived, it was probably intended primarily for use as an anti-
balloon A balloon is a flexible membrane bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, or air. For special purposes, balloons can be filled with smoke, liquid water, granular media (e.g. sand, flour or rice), ...
weapon, while fitted to aircraft. However, an alternate barrel with a bayonet attachment, for use by infantry, was also designed.


History

During the outbreak of the First World War, observation balloons were essential for both sides of the front. These static balloons inflated with hydrogen, became targets for airmen on both sides, and were defended by anti-aircraft batteries and patrol fighters. To face these balloons, conventional ammunition proved to be inefficient, and other alternatives were sought. In 1916, French officer Yves le Prieur created a rocket system powered by electricity, but its range was limited. In 1917, tracer and incendiary ammunition was being developed to target these balloons. To meet this need, Frank F. Burton of Winchester, developed the "Burton Light Machine Rifle", a selective fire blowback rifle, with selection of rate of fire to be used in observation and surveillance planes, the first practical version of which was ready in 1917. For this rifle, he adapted the .351 WSL cartridge into a rimless cartridge, firing an incendiary Spitzer bullet, resulting in the .345 Winchester Self-Loading.


Dimensions


See also

*
9 mm caliber This is a list of firearm cartridges that have bullets in the to caliber range. *''Case length'' refers to the round case Case or CASE may refer to: Instances * Instantiation (disambiguation), a realization of a concept, theme, or design ...
* .35 Remington *
List of rifle cartridges List of rifle cartridges, by primer type, Caliber, calibre and name. File:Cartridge Sample 2.jpg, 350px, From left to right: 1 .17 Hornady Mach 2, 2 .17 Hornady Magnum Rimfire, 3 .22 Long Rifle, 4 .22 Winchester Magnum Rimfire, 5 .17/23 SMc, 6 5mm ...
*
Table of handgun and rifle cartridges This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load (e.g. the highest muzzle energy might not be in the same ...


References


External links


Forgotten Weapons: America's First Assault Rifle: Burton 1917 LMR. By Ian McCollum, July 4, 2016
{{Winchester Cartridges Firearms Pistol and rifle cartridges Winchester Repeating Arms Company cartridges