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300 Winchester Magnum / Reloading:
Written by: Kim Lockhart, Copyright.

300 Winchester Magnum Reloading Specifications:
Bullet Diameter = .308".
Maximum Case Length = 2.620".
Trimmed Case Length = 2.610".
Primer Size = Large Rifle, Type = Magnum.
Maximum Cartridge Overall Length = 3.340".

300 Winchester Magnum Reloading Data:
 For the Antelope, Hog, Blacktail, Whitetail or Mule Deer hunter hand-loading or reloading his or her own 300 Winchester Magnum ammunition, Western Powders, Ramshot Hunter rifle powder does an impressive job of launching 150 grain .308" diameter bullets at high velocity. Ramshots online reloading data shows that a 150 grain .308" diameter Hornady SST bullet using 69.9 grains of Ramshot Hunter powder can be driven to a velocity of 3,118 feet per second loaded at a maximum cartridge overall length of 3.340" in the 300 Winchester Magnum. This load does not top out until the 150 grain bullet is at 3,408 feet per second at a chamber pressure of 63,982 PSI. For the 150 grain bullet reload if you sighted your 300 Winchester Magnum hunting rifle in dead on at 245 yards it would only be 2 inches high at 150 yards and only 3.0 inches low at 300 yards which would be an excellent Antelope, Hog, Blacktail Deer, Whitetail Deer or Mule Deer load.

300 Winchester Magnum Load Data And Ballistics Table
Test Powder Used = Ramshot Hunter.
Test Bullet Used = Hornady - SST - .308" diameter.
Test Primer Used = Federal 215.
Test Case Used = Winchester - 300 Winchester Magnum.
Test Case Trimmed Length = 2.610".
Loaded Cartridge Overall Length = 3.340".
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.
150 .226 .415 69.9 3,118 77.7 3,408 63,982
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 150 .415 3,408 3,868 0 - 2.0" - 4.5"
Long Range Ballistics Table For Above Load:
Bullet 100 yds. 200 yds. 300 yds. 400 yds. 500 yds. 600 yds. 700 yds.
Velocity Fps. 3,157 2,922 2,698 2,485 2,282 2,088 1,905
Energy Ft.lbs. 3,320 2,843 2,424 2,057 1,735 1,453 1,208
Trajectory + 1.0" 0 - 5.1" - 15.0" - 30.5" - 52.7" - 82.9"
Maximum Effective Range For Thin Skinned Big Game: 700 Yards.
Maximum Effective Range For Thick Skinned Big Game: 500 Yards.


300 Winchester Magnum Load Data Sources:
Hodgdon Reloading Data Center: The reloading data information displayed on this site, including ballistic data, was derived from tightly controlled laboratory conditions, by ballisticians and expert handloaders. Lists pressure test results as well. Features load data using Hodgdon, IMR & Winchester Rifle Powders.

Accurate Reloading Data Center: The reloading data information displayed on this site, including ballistic data, was derived from tightly controlled laboratory conditions, by ballisticians and expert handloaders. Lists pressure test results as well. Features load data using Accurate Rifle Powder. Accurate is an exclusive brand of Western Powders Incorporated.

Ramshot Reloading Data Center: The reloading data information displayed on this site, including ballistic data, was derived from tightly controlled laboratory conditions, by ballisticians and expert handloaders. Lists pressure test results as well. Features load data using Ramshot Rifle Powder. Ramshot is an exclusive brand of Western Powders Incorporated.

Barnes - 300 Winchester Magnum: Load data for the 300 Winchester Magnum featuring the use of Barnes bullets.

Nosler - 300 Winchester Magnum: Load data for the 300 Winchester Magnum using Nosler bullets. Features; varying case capacity and load density for each bullet weight and accuracy loads.

Norma - 300 Winchester Magnum: Load data for the 300 Winchester Magnum featuring the use of Norma rifle powders.

Vihtavuori - 300 Winchester Magnum: Load data for the 300 Winchester Magnum featuring the use of Vihtavuori rifle powders.

IMR - 300 Winchester Magnum: Load data for the 300 Winchester Magnum featuring the use of IMR rifle powders.


Reloading Data:
223 Remington
243 Winchester
25-06 Remington
270 Winchester
7mm Rem. Mag.
30-30 Winchester
308 Winchester
30-06 Springfield
300 Win. Mag.

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