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The breech is opened by the breechblock moving in-line with the axis of the barrel and is locked in the closed position by an obstruction such as a cam, wedge, pawl or levers. A roller lock is commonly associated with firearms produced by Heckler & Koch. This type of breechblock can be adapted to cycle by lever, cocking handle, gas or recoil.
List of Winchester Center Fire rifle cartridges.More commonly known as WCF, it is a family of cartridges designed by Winchester Repeating Arms Company. [1] There are many other Winchester cartridges that do not carry the WCF moniker, such as the .300 WSM. .270 Winchester, and .300 Winchester Magnum
In the Mauser-style turn-bolt action, [4] [5] the bolt handle must be rotated upward, pull rearward, pushed forward, and finally rotated back downward into lock. In a straight pull bolt-action, the bolt can be cycled without rotating, hence reducing the required range of motion by the shooter from four movements to two, with the goal of ...
When the breechblock is in the closed (top) position, it seals the chamber from the high pressures created when the cartridge fires and safely transfers the recoil to the action and stock. When the breechblock is in the opened (bottom) position, the rear (breech) end of the chamber is exposed to allow ejection or extraction of the fired case ...
Although breech-loading firearms were developed as far back as the early 14th century in Burgundy and various other parts of Europe, [3] [4] breech-loading became more successful with improvements in precision engineering and machining in the 19th century. The main challenge for developers of breech-loading firearms was sealing the breech.
All of the WSM cartridges are inspired on the .404 Jeffery non-belted magnum cartridge which is shortened to fit a short rifle action (such as a .308 Winchester). [1] It was developed by Rick Jamison in 1997-1998 as proven in a 2005 lawsuit Jamison vs. Olin Corporation-Winchester division. [2] Jamison was given 7 patents on the cartridge design.
.308 Winchester: the commercial name of a centerfire cartridge based on the military 7.62×51 mm NATO round. Two years prior to the NATO adoption of the 7.62×51 mm NATO T65 in 1954, Winchester (a subsidiary of the Olin Corporation) branded the round and introduced it to the commercial hunting market as the .308 Winchester.
This is a list of firearm cartridges which have bullets in the 4 millimetres (0.16 in) to 4.99 millimetres (0.196 in) caliber range. All measurements are in mm (in). Rimfire cartridges