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.