264 Winchester Magnum History and General Information.  The .264 Winchester Magnum was one of a series of short belted magnums developed by winchester, it was officially introduced to the public in 1959 by winchester.  The 264 winchester magnum is an excellent, accurate, and flat shooting cartridge that is capable of taking any game in the lower 48 states and is one of the more powerful 26 caliber cartridges, when loaded with 140 grain bullets at 3100 fps. it is a very adequate round for deer at 500 yards.  The 264 Winchester magnum has had a reputation as being hard on barrels and will wear out in as few as 500 rounds, back in 1959 this may have been true but we are now into the 21st. century where cryo treating barrels extends the life of barrels considerably and this would include the 264 win.mag. as well.  The 264 winchester magnum when loaded with 129 grain bullets recoil is quite minimal and controllable when loaded with 140 grain bullets the recoil increases quite a bit, a good recoil pad fitted to the rifle will tame the recoil before it gets to your shoulder.   264 Winchester Magnum Barrel Specifications. Common Barrel Twist Rate - 1/9 Bore Groove Diameter - .263"   264 Winchester Magnum Reloading Specifications. Bullet Diameter - .264" Maximum Case Length - 2.500" Trimmed Case Length - 2.490" Primer Size - Large Rifle   264 Winchester Magnum Loading Data Hints.  The 264 Winchester Magnum will come to life with the very slow burning powder i.m.r.7828, when using 140 grain weight bullets the full devastating power potential of this cartridge can and will be realized. 264 Winchester Magnum Reloading Data. Hodgdon Reloading Data Center.   264 Winchester Magnum Trajectory and Hunting Applications.  This is a down range trajectory chart for the 264 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, Varmint / Predator size game, such as Bobcat, Cougar, Coyote. 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. Bullet diameter .264" Bullet weight 140 grains Bullet ballistic coeffecient .441 Bullet velocity 3,100 feet per second Range 100 yds. 200 yds. 300 yds. 400 yds. 500 yds. + + 1.4 0 - 6.5 - 18.8 - 38.1 2570 2199 1872 1588 1341  Varmint + + + + + +  Deer + + + + + +  Elk + + + - - -  Moose + + - - - - Copyright 2001 - 2010