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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.
This new .270 cartridge was the third commercial .270 ever produced, and the first one in 60 years. [1] The 270 WSM is an improvement over the older 270 Winchester providing higher velocity with bullets of the same weight, and thus a flatter trajectory and more energy. Velocities tend to be about 250 ft/s (76 m/s) faster, in a cartridge that is ...
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
The .270 ICL is an improved .264 Winchester Magnum necked up to .270. It's a relatively efficient cartridge for its class. Performance with a 130-grain (8.4 g) bullet is approximately 3,405 ft/s (1,038 m/s) and with a 150-grain (9.7 g) bullet is approximately 3,250 ft/s (990 m/s). [18]
With a 165-grain bullet, the 6.8 Western is capable of matching the muzzle velocity of a .270 Winchester loaded with a 150-grain bullet. The higher ballistic coefficient of the 6.8 Western results in a flatter trajectory at distances beyond 600 yards, which may be controversial for hunting purposes.
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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".
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