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338 Winchester Magnum History And General Information:
Written by: Kim Lockhart, Copyright.

338 Winchester Magnum:
 The .338 Winchester Magnum was one of a series of belted bottlenecked cartridge magnums developed by winchester, it was officially introduced to the public in 1958 by winchester. The 338 magnum was introduced with the 264 win. mag. as well, all chambered in various model 70 magnum rifles by winchester. The 338 winchester magnum is an excellent, accurate, flat shooting and hard recoiling cartridge that is capable of taking any game on the north american continent. Hunters in the northern most portions of the continent face very large and dangerous bears and this would include polar bears making this cartridge an overwhelming favorite.

 Western hunters in north america find favor with this cartridge for long distance elk hunting with the most popular bullet weight being used is 225 grains. The 225 grain bullet is about the middle of bullet weights available and it offers good ballistic profiles by most bullet manufacturers and has high energy retention at 500 yards capable of cleanly harvesting any animal in north america as well. Twenty six inch length barrels in a heavy configuration are a good choice and the extra length will add weight to the rifle and reduce recoil somewhat. A good rifle weight for this cartridge would be in excess of nine pounds to help reduce recoil.

 The 338 winchester magnum is an excellent choice for anyone who would be persuing very large animals to hunt on most hunts. 225 grain bullets launched at 2,800 feet per second in most bullet profiles still deliver over 1 ton of bullet energy at 500 yards. The 338 winchester magnum can be shot with great accuracy as long as the shooter doesn't become to recoil sensitive. Range sessions should be limited to no more than 9 rounds of ammo per outing.

338 Winchester Magnum Barrel Specifications.
Common Barrel Twist Rate - 1 in 10".
Bore Groove Diameter - .338".

338 Winchester Magnum Cartridge Case Dimensions.
Neck Diameter - .369".
Shoulder Diameter - .491".
Base Diameter - .513".
Rim Diameter - .532".

338 Winchester Magnum Reloading Specifications.
Bullet Diameter - .338".
Maximum Case Length - 2.500".
Trimmed Case Length - 2.490".
Primer Size - Large Rifle, Type - Magnum.
Maximum Cartridge Overall Length - 3.340".

338 Winchester Magnum Loading Data Hints.
 The 338 Winchester Magnum with a 26 inch barrel length will come to life with the slow burning powders like IMR4350 and IMR4831 when using 225 grain weight bullets the full devastating power potential of this cartridge can and will be realized.

338 Winchester Magnum Reloading Data.
Hodgdon Reloading Data Center.

338 Winchester Magnum Trajectory and Hunting Applications.

 This is a down range trajectory chart for the 338 Winchester Magnum cartridge with the scope mounted 1.5 inches above the bore center line plus if you were using this load, its effective hunting bullet energy range with well placed shots on,
Deer size game, such as Antelope, Blacktail, Hogs, Javelina, Mule, Whitetail.
Elk size game, such as Caribou, Black Bear, Sheep.
Moose size game, such as Brown Bear, Grizzly Bear, Polar Bear, Bison, Buffalo.
Bullet diameter .338"
Bullet weight 225 grains
Bullet ballistic coeffecient .515
Bullet velocity 2,840 feet per second
Range
100 yds.
200 yds.
300 yds.
400 yds.
500 yds.
+
+ 1.7
0
- 7.3
- 21.1
- 42.3
3539
3097
2700
2344
2025
 Deer
+
+
+
+
+
-
 Elk
+
+
+
+
+
-
 Moose
+
+
+
+
+
-


Rifle Ballistics:
.32" Caliber
325 WSM
.33" Caliber
338 Win. Mag.
340 Wby. Mag.

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Rifle Cartridges And Reloading - Rifle Cartridges And Ballistics
Centerfire Rifle Cartridges:
17 Rem. - 204 Ruger - 22 Hornet - 222 Rem.
223 Rem. - 22-250 Rem. - 220 Swift - 223 WSSM
243 Win. - 6mm Rem. - 243 WSSM - 240 Wby. Mag.
250 Savage - 257 Roberts - 25 WSSM - 25-06 Rem.
257 Wby. Mag. - 6.5 x 55mm - 260 Rem.
6.5mm Rem. Mag. - 264 Win. Mag. - 6.8mm Rem.
270 Win. - 270 WSM - 270 Wby. Mag. - 7mm-08 Rem.
280 Rem. - 7mm Rem. Mag. - 7mm WSM
30-30 Win. - 308 Win. - 30-06 Springfield
300 Win. Mag. - 300 WSM - 300 Wby. Mag.
325 WSM - 338 Win. Mag. - 340 Wby. Mag.
357 Mag. - 44 Mag. - 444 Marlin - 45-70 Government