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270 Winchester / History:
Centerfire Rifle Cartridges
Written by: Kim Lockhart, Copyright.

270 Winchester:
The 270 Winchester is based on the more popular 30-06 cartridge case necked down to .277" caliber. Winchester began producing the 270 Winchester in 1923. Although the 270 Winchester was in production in 1923 it was not officially announced until the introduction of their model 54 rifle chambered in their 270 Winchester cartridge in 1925, later it would be chambered in their famous featherweight model 70 bolt action rifle. The 270 Winchester is a great dual purpose cartridge it can be used for varmints sending a 110 gr. bullet out the muzzle at a sizzling 3,450 feet per second or it can be used as a big game cartridge sending 130 grain bullets out the muzzle at speeds of 3,100 feet per second with sufficient power out to the 400 yard mark for deer sized game plus using 140 grain bullets at 3,090 feet per second it will harvest an elk with bullet energy to spare out to about 350 yards.

 If you were looking to buy a new rifle just to hunt in North America and you were going to hunt white-tailed deer for the most part the 270 Winchester offers plenty of range and energy for that. If you were going to hunt elk and moose some of the time, well the 270 Winchester offers enough bullet weight and energy for that also.

 While much has been written about the 270 Winchester cartridge it truly is a great North American, big game cartridge. There are plenty of excellent bullet choices for handloaders and as of lately more factory ammunition choices are available in a variety of bullet weights as well. The 270 Winchester with the power it offers down range will recoil somewhat to the shooters shoulder with heavier bullets in the 150 grain range but is still tolerable to shoot. If the recoil bothers you to much just find a quality gunsmith in your area and have a recoil pad installed on your rifle or shoot reduced recoil ammunition.

 To achieve maximum accuracy from your 270 Winchester rifle there are several things you need to do correctly that will help increase your rifles overall accuracy capabilities.
First: Properly mount your riflescope.
Second: Properly break-in your rifle barrel.
Third: Properly sight-in your rifle.
Fourth: Properly clean your rifles bore.
 To accurately calculate ballistics for your rifle with ballistics programs you need to measure your rifles scope mounted height.


270 Winchester / Hunting Applications:

243 Winchester vs. 260 Remington vs. 7mm-08 Remington vs. 308 Winchester.
25-06 Remington vs. 270 Winchester vs. 280 Remington vs. 30-06 Springfield.
264 Winchester Magnum vs. 7mm Remington Magnum vs. 300 Winchester Magnum.
 These are down range trajectory charts for the 270 Winchester cartridge with the scope mounted 1.8 inches above the bore center line plus if you were using these loads, their effective hunting bullet energy range with well placed shots on;
Predators: Such As, Bobcat, Cougar And Coyote.
Deer Size Game: Such As, Antelope, Blacktail Deer, Hogs, Javelina, Mule Deer And Whitetail Deer.
Elk Size Game: Such As, Caribou, Black Bear, Sheep And Elk.
Moose Size Game: Such As, Brown Bear And Moose.
Good Predator Hunting Load:
270 Winchester rifle cartridge manufacturer: Cor-Bon.
Bullet weight: 110 Grains.
Bullet ballistic coefficient: .323.
Bullet muzzle velocity: 3,450 Feet Per Second.
Bullet muzzle energy: 2,907 Foot Pounds.
Bullet trajectory is set at 1 inch mid-range rise.
Rifle true zero is 200 Yards.
Maximum point blank range is 230 yards.
110 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 0.9 0 - 5.2 - 15.9 - 33.2
Energy in Foot Pounds: 2,389 1,955 1,587 1,277 1,016
Predator Effectiveness: + + + + +
Good Deer Hunting Reload:
270 Winchester rifle cartridge manufacturer: Handload.
Bullet weight: 140 Grains.
Bullet ballistic coefficient: .486.
Bullet muzzle velocity: 3,062 Feet Per Second.
Bullet muzzle energy: 2,914 Foot Pounds.
Bullet trajectory is set at 2 inch mid-range rise.
Rifle true zero is 227 Yards.
Maximum point blank range is 265 yards.
140 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 1.7 + 1.0 - 4.6 - 15.8 - 33.5
Energy in Foot Pounds: 2,549 2,224 1,932 1,672 1,439
Deer Effectiveness + + + + +
Good Deer Hunting Load:
270 Winchester rifle cartridge manufacturer: Hornady.
Bullet weight: 130 Grains.
Bullet ballistic coefficient: .460.
Bullet muzzle velocity: 3,200 Feet Per Second.
Bullet muzzle energy: 2,955 Foot Pounds.
Bullet trajectory is set at 2 inch mid-range rise.
Rifle true zero is 235 Yards.
Maximum point blank range is 272 yards.
130 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 1.7 + 1.2 - 3.8 - 13.9 - 30.2
Energy in Foot Pounds: 2,570 2,228 1,924 1,653 1,414
Deer Effectiveness + + + + +
Good Elk Hunting Load:
270 Winchester rifle cartridge manufacturer: Hornady.
Bullet weight: 140 Grains.
Bullet ballistic coefficient: .495.
Bullet muzzle velocity: 3,090 Feet Per Second.
Bullet muzzle energy: 2,968 Foot Pounds.
Bullet trajectory is set at 3 inch mid-range rise.
Rifle true zero is 265 Yards.
Maximum point blank range is 315 yards.
140 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 2.4 + 2.5 - 2.2 - 12.3 - 28.8
Energy in Foot Pounds: 2,603 2,276 1,983 1,721 1,487
Elk Effectiveness: + + + - -
Good Moose and Large Bear Hunting Load:
270 Winchester rifle cartridge manufacturer: Winchester.
Bullet weight: 150 Grains.
Bullet ballistic coefficient: .503.
Bullet muzzle velocity: 2,950 Feet Per Second.
Bullet muzzle energy: 2,898 Foot Pounds.
Bullet trajectory is set at 4 inch mid-range rise.
Rifle true zero is 282 Yards.
Maximum point blank range is 335 yards.
150 Grain Bullet
Down Range
At 100
Yards
At 200
Yards
At 300
Yards
At 400
Yards
At 500
Yards
Trajectory in Inches: + 3.2 + 3.5 - 1.3 - 12.1 - 29.8
Energy in Foot Pounds: 2,543 2,225 1,938 1,682 1,432
Moose Effectiveness: + + - - -

270 Winchester / Specifications:
Rifle:
Barrel Length - 24".
Bore Twist Rate - 1 in 10".
Bore Groove Diameter - .277".
Cartridge:
Bullet Diameter - .277".
Primer Size - Large Rifle.
Case Neck Diameter - .308".
Case Shoulder Diameter - .441".
Case Base Diameter - .470".
Case Rim Diameter - .473".
Maximum Case Length - 2.540".
Trimmed Case Length - 2.530".
Maximum Overall Length - 3.340".
Ammunition:
270 Winchester
Cartridge
Manufacturer
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Bullet
Muzzle
Velocity
Fps.
Bullet
Muzzle
Energy
Ft. lbs.
8.5 lb. Rifle,
Recoil
Energy
Ft. lbs.
Remington 100 .252 3,320 2,447 13.52
Cor-Bon 110 .323 3,450 2,907 15.98
Remington 115 .295 2,710 1,875 12.95
Norma 120 .314 3,250 2,814 16.75
Hornady 130 .460 3,200 2,956 18.34
Hornady 140 .495 3,090 2,968 19.48
Federal 145 .410 2,200 1,558 11.66
Winchester 150 .503 2,950 2,898 20.29

Rifle Ballistics:
.27" Caliber
6.8 Rem.
270 Win.
270 WSM
270 Wby. Mag.

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