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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 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 shorter and can therefore be used in a shorter action resulting in a more compact rifle if desired.
The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the .223 Remington. Because of the pressures associated with the 5.56×45mm, it is not advisable to fire 5.56×45mm rounds in an AR-15 marked as .223 Remington, since this can result in damage to the rifle or injury to the shooter. [1]
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;
WSM and WSSM family of cartridges. From left to right: .223 WSSM, .243 WSSM, .25 WSSM, .270 WSM, 7 mm WSM, .300 WSM, .325 WSM. Winchester Super Short Magnum, or WSSM is a line of rebated bottlenecked centerfire short magnum cartridges introduced by the U.S. Repeating Arms Company (Winchester Inc). [1]
The Remington 710 is a moderately priced rifle. With the synthetic stock and the already mounted scope, it makes an adequate rifle for the novice shooter or hunter. This particular model has been heavily criticized, however, because many of the polymer receiver which was replaced with a steel one in the final production year.
The receiver and bolt designs make the rifle relatively simple to produce with a left-handed bolt. So, it is popular among left-handed users. The bolt head of the Model 110 is a "floating" design: A flat spring located behind the front baffle and bolt head assembly gives the assembly a small amount of free movement lateral to the bore axis.
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".