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270 Winchester - Ballistics - Hunting - Reloading.
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Ballistics:
 Barrel Twist Rates
 Barrel Break-In
 Rifle Scopes
 Rifle Scope Mounts
 Rifle Scope Mounting
 Rifle Scope Sight-In
 Precision Targets
 Shooting
 Precision Bold Targets.
Reloading:
 Equipment
 How To
 Black Powder
 Recoil
Reloading Accuracy:
 Brass
 Primers
 Powder
 Bullets
 Load Testing
 Run-Out.
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270 Winchester:
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 grain bullet out the muzzle at 3,200 feet per second or it can be used as a big game cartridge sending 140 grain bullets out the muzzle at speeds of 3,000 feet per second with sufficient power out to the 400 yard mark for deer, elk and moose size animals.

 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.

Reloading Specifications:
Bullet Diameter = .277".
Maximum Case Length = 2.540".
Trimmed Case Length = 2.530".
Primer Size = Large Rifle.
Maximum Cartridge Overall Length = 3.340".

Reloading Data:
 For the Deer, Elk or Moose hunter hand-loading or reloading his or her own 270 Winchester ammunition, Western Powders, Accurate Magpro rifle powder does an impressive job of launching 140 grain .277" diameter bullets at high velocity. Ramshots online reloading data shows that a 140 grain .277" diameter Hornady Boat-Tail bullet using 57.0 grains of Accurate Magpro powder can be driven to a velocity of 2,808 feet per second loaded at a maximum cartridge overall length of 3.210" in the 270 Winchester. This load does not top out until the 140 grain bullet is at 3,062 feet per second at a chamber pressure of 64,603 PSI. For the 140 grain bullet reload if you sighted your 270 Winchester hunting rifle in dead on at 225 yards it would only be 2 inches high at 125 yards and only 3.0 inches low at 275 yards which would be excellent for deer, elk and moose.

270 Winchester Load Data And Ballistics Table
Test Powder Used = Accurate Magpro.
Test Bullet Used = Hornady - Boat-Tail Spire Point - .277" diameter.
Test Primer Used = Winchester - WLR.
Test Case Used = Winchester - 270 Winchester.
Test Case Trimmed Length = 2.530".
Loaded Cartridge Overall Length = 3.210".
Test Barrel Length = 24".
Test Barrel Twist Rate = 1 in 10".
Hornady
Bullet
Weight
Grains
Hornady
Bullet
Sectional
Density
Hornady
Bullet
Ballistic
Coefficient
Powder
Start
Load
Grains
Start
Load
Velocity
Fps.
Powder
Maximum
Load
Grains
Maximum
Load
Velocity
Fps.
Maximum
Load
Pressure
P.S.I.
140 .261 .486 57.0 2,808 63.3 3,062 64,603
Short Range Ballistics Table For Above Load:
Recommended
Cartridge
Usage:
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Muzzle
Velocity
Fps.
Muzzle
Energy
Ft. Lbs.
Rifle
Zero
100 Yds.
Bullet
Drop
200 Yds.
Bullet
Drop
250 Yds.
Big Game 140 .486 3,062 2,914 0 - 2.7" - 5.9"
Long Range Ballistics Table For Above Load:
Bullet 100 yds. 200 yds. 300 yds. 400 yds. 500 yds. 600 yds. 700 yds.
Velocity Fps. 2,864 2,675 2,493 2,319 2,152 1,991 1,838
Energy Ft.lbs. 2,549 2,224 1,932 1,672 1,439 1,232 1,050
Trajectory + 1.4" 0 - 6.3" - 18.1" - 36.4" - 62.3" - 97.0"
Maximum Effective Range For Thin Skinned Big Game: 600 Yards.
Maximum Effective Range For Thick Skinned Big Game: 300 Yards.



Rifles
Ammunition
Dies
Brass
Bullets.

Factory Ammunition Ballistics:
 The below 270 Winchester rifle ballistics table will give rifle cartridge bullet weight measured in grains, velocity measured in feet per second, energy measured in foot pounds, trajectory measured in inches and rifle recoil energy measured in foot pounds based on a fully loaded and scoped 8.5 pound, 24" barrel length rifle with scope mounted 1.5" above bore centerline.
Rifle Ballistics Table Compiled By: Kim Lockhart, Copyright.
270 Winchester Factory Ammunition Ballistics Table
Centerfire Rifle Cartridge /
Cartridge Manufacturer;
CB=Cor-Bon, F=Federal,
H=Hornady, N=Norma,
R=Remington, W=Winchester
Bullet
Weight
Grains
Bullet
Ballistic
Coefficient
Muzzle
Velocity
Fps.
Muzzle
Energy
Ft. lbs.
Recoil
Energy
Ft. lbs.
Rifle
Zero
100 Yds.
Bullet
Drop
200 Yds.
Bullet
Drop
300 Yds.
Bullet
Drop
400 Yds.
Bullet
Drop
500 Yds.
270 Winchester / R 100 .252 3,320 2,447 13.52 0 - 2.6" - 10.6" - 25.6" - 50.2"
270 Winchester / CB 110 .323 3,450 2,907 15.98 0 - 2.1" - 8.5" - 20.3" - 38.8"
270 Winchester / R 115 .295 2,710 1,875 12.95 0 - 4.5" - 16.7" - 38.9" - 74.1"
270 Winchester / N 120 .314 3,250 2,814 16.75 0 - 2.6" - 10.1" - 23.9" - 45.7"
270 Winchester / H 130 .460 3,200 2,956 18.34 0 - 2.4" - 9.3" - 21.5" - 39.7"
270 Winchester / H 140 .495 3,090 2,968 19.48 0 - 2.7" - 10.1" - 23.0" - 42.1"
270 Winchester / F 145 .410 2,200 1,558 11.66 0 - 7.2" - 24.8" - 55.1" - 100.9"
270 Winchester / W 150 .503 2,950 2,898 20.29 0 - 3.1" - 11.3" - 25.6" - 46.8"

Current "2014"
Rifle Ammunition
Prices At:
Brownells,
Cabelas,
Sinclair,
Sportsmans Warehouse.