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The .270 Winchester is a rifle cartridge developed by Winchester Repeating Arms Company in 1923, and it was unveiled in 1925 as a chambering for their bolt-action Model 54 [3] to become arguably the flattest shooting cartridge of its day, only competing with the .300 Holland & Holland Magnum, also introduced in the same year.
The .270 Weatherby Magnum was the first belted magnum based on the .300 H&H Magnum to be developed by Roy Weatherby in 1943. [2] The cartridge is short enough to function in standard-length long actions with a brass length of 2.549" or 64.74mm and an overall length of about 3.295".
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 , is 270 WSM, without a decimal point. [3]
The Winchester Model 54 is a bolt-action rifle manufactured by the Winchester Repeating Arms Company. The 54 was the first successful production run civilian centerfire bolt action for Winchester. The 54 was the first successful production run civilian centerfire bolt action for Winchester.
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.
The most prominent of these cartridges was the .45-70 (pronounced “forty five seventy”), but common chamberings in 45 caliber included .45-70, .45-90, .45-110, and even a .45-120 offering that ...
Model 275 (1964) slide-action .22 WMR rifle (Model 270 variant) Model 310 (1972) single shot .22 rifle Model 320 (1972) bolt-action .22 rifle 5 or 10 round box magazine
Ross rifle.303 British: 1903 Canada: Ruger American.204 Ruger.22LR.223 Remington.243 Winchester.270 Winchester.308 Winchester.300 Winchester Magnum.338 Winchester Magnum. 5.56×45mm NATO.30-06 Springfield. 7.62×39mm. 2011 United States: Ruger M77.220 Swift.22-250 Remington.243 Winchester.25-06 Remington.257 Roberts.264 Winchester Magnum.270 ...