300 Winchester Magnum Reloading:
The 300 Winchester Magnum has always given top performance to those that handload their own ammunition for the simple fact you can tweak loadings for top performance. Hornady has seen fit to address this issue with their superformance ammunition offering loadings to boost performance for non-reloaders. The ballistics on these rounds are impressive breathing more fire into an already great cartridge. The following load data is a factory duplication load.
Superformance Duplication Load:
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 P.S.I.. 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.
Test Powder Used = Ramshot Hunter.
Test Bullet Used = Hornady / Type = SST / Diameter = .308".
Test Primer Used = Federal 215.
Test Case Used = Winchester.
Test Case Trimmed Length = 2.610".
Loaded Cartridge Overall Length = 3.340".
Test Barrel Length = 24".
Test Barrel Twist Rate = 1 in 10".
|150 ||.226 ||.415 ||69.9 ||3,118 ||77.7 ||3,408 ||63,982|
|Load Data Ballistics:|
Rifle Barrel Length: 24 Inches.
Rifle scope mounted 1.8 inches above bore center-line.
Note: (Fps. = Feet Per Second.) (Ft. Lbs. = Foot Pounds.) (In. = Inches.)
|Range: ||Muzzle||100 yds. ||200 yds. ||300 yds. ||400 yds. ||500 yds. ||600 yds. |
||2,485 ||2,282 ||2,088|
||- 15.0" ||- 30.5" ||- 52.7"
300 Winchester Magnum Reloading Data:
Reloading Data Directory.
300 Winchester Magnum Reloading For Accuracy:
Reloading for accuracy in the 300 Win. Mag. is not all that difficult. I have written a guide for rifle cartridge reloading that will solve any issues you may have reloading your empty 300 Win. Mag. brass into fully loaded accurate rifle cartridges. Some of the most important issues when reloading for the 300 Win. Mag. is case capacity as this is a variable in reloading not a constant.
Reloading: Accuracy, Brass, Primers, Powder, Bullets, Run-Out.