270 Winchester
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270 Winchester

270 Winchester


270 Winchester

Winchester, the renowned rifle manufacturer, developed the .270 Winchester in early1920s. Since then every rifle manufacturer has launched .270 Winchester. It is one of the most accepted cartridges among the big game hunters who hunt mules to elks. Winchester commercially launched it with its Model 54 rifle in mid 1920s. The cartridge was inspired by 30/06 Springfield cartridge case. In the process of developing 270 Winchester, the case was modified to .277 caliber bullet.

The bullet weight for 270 Winchester ranges from a minimum of 100 to a maximum of 150 grains. The 100 grain leaves the muzzle at a high speed of 3500 fps (Feet per second) while the heavier 150 grain leaves at around 2900 fps. Some experts have an opinion that 130 grain bullet is the most ideal bullet for 270 Winchester. The 270 Winchester bullets have comparatively smaller frontal diameter then a 7 mm bullet. Due to this, some hunters don't prefer it while shooting the big animals like an elk.

A Barrel Twist rate of 1:10 and the Bore groove measuring 0.257" in diameter is the specified Barrel specifications for 270 Winchester, which is similar to .25-06 Remington. The two are also similar in other key specifications. The cartridge case length can be between 2.53" to 2.54". All major powder manufacturers like Hodgdon, Alliant, IMR, and Norma make powder for this cartridge. A 0.277" diameter 130-grain bullet has zero Bullet Drop at a distance of about 200 yards. The same bullet drops to nearly 40" at distance of 500 yards. Also at 500 yards, the Bullet energy drops to about 40 percentage of its initial value of about 2500 Ft. Lbs. The bullet speed on such a trajectory is about 3,100 fps. Remington 9 1/2 primer is the most widely used primers for this variety of cartridge. 270 Winchester is one of the best cartridges ever produced by Winchester.

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