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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.
The .270 Winchester cartridge is equipped with a 130-grain bullet traveling at approximately 3,060 feet per second (fps). When sighted in to intersect 3 inches above the line of sight at 100 yards (about 90 meters), it maintains a trajectory that rises no more than 3.5 inches and aligns with the line of sight around 270 yards.
A guide to the recoil from the cartridge, and an indicator of bullet penetration potential. The .30-06 Springfield (at 2.064 lbf-s) is considered the upper limit for tolerable recoil for inexperienced rifle shooters. [2] Chg: Propellant charge, in grains; Dia: Bullet diameter, in inches; BC: Ballistic coefficient, G1 model; L: Case length (mm)
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 ( SAAMI ), is 270 WSM, without a decimal point. [ 3 ]
Bullet mass/type Velocity Energy; 120 gr (8 g) X: 3,384 ft/s (1,031 m/s) 3,052 ft⋅lbf (4,138 J) 140 gr (9 g) X: 3,268 ft/s (996 m/s) 3,321 ft⋅lbf (4,503 J) 150 gr (10 g) BT: 3,233 ft/s (985 m/s) 3,482 ft⋅lbf (4,721 J) 160 gr (10 g) Partition: 3,177 ft/s (968 m/s) 3,587 ft⋅lbf (4,863 J) 175 gr (11 g) PSPCL: 3,047 ft/s (929 m/s)
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 ...
When firing a 9.7 g (150 gr) AccuBond Long Range bullet from a rifle with a 660 mm (26 in) barrel, the .27 Nosler has an approximately 120 m/s (400 ft/s) advantage over the .270 Winchester, about a 90 m/s (300 ft/s) advantage over the .270 WSM, and about a 30–46 m/s (100–150 ft/s) velocity advantage over the .270 Weatherby. The primary use ...
"Grain foot per second" (gr·ft/s) can be obtained by measuring the mass in grains (gr) (7,000 to the pound) and velocity in feet per second (ft/s), but since their product yields a very large number it is common to multiply by a factor of 1 ⁄ 1000, obtaining the power factor in kilo grain foot per second instead.