.264 Win. Mag. Load Data

The .264 Winchester Magnum, introduced by Winchester in 1959, is a belted, bottlenecked cartridge designed to deliver high velocity and flat trajectory performance. It was first chambered in the Winchester Model 70 Westerner rifle, aiming to compete with other high-velocity, flat-shooting cartridges available at the time, particularly the 7mm Remington Magnum and the .270 Winchester. Derived from the .375 H&H Magnum case, necked down to accept 6.5mm (.264 inch) bullets, the cartridge blended American enthusiasm for powerful, long-range cartridges with the growing interest in 6.5mm bore diameters, which were already immensely popular in Europe. Despite its innovative design and capable ballistics, the .264 Winchester Magnum experienced only moderate commercial success, often overshadowed by competitors in both popularity and factory ammunition availability. Nevertheless, it carved out a loyal following among shooters who appreciated its impressive external ballistics and versatility.

In terms of practical application, the .264 Win. Mag. quickly established itself as an excellent choice for both hunting and long-range target shooting. Ballistically, it is known for producing top-tier velocities with relatively high Ballistic Coefficient (BC) 6.5mm projectiles, making it apt for flat-shooting, wind-bucking performance, particularly valuable in open terrain. Hunters found the cartridge effective for medium to large game, especially in North American settings where shots could be long, such as in western mule deer or pronghorn country. The cartridge’s high velocity and flat trajectory made it appealing to those seeking confidence at longer ranges, and with modern bullet designs, its effectiveness on game has only improved. For precision shooters and reloaders, the .264 Winchester Magnum's case capacity allows for significant handloading flexibility, letting enthusiasts fine-tune performance for both hunting and target work.

When it comes to target species, the .264 Win. Mag. is primarily used for medium-sized game such as deer, pronghorn, and sheep, and with heavy-for-caliber bullets, it is also capable for elk under appropriate shot conditions. The combination of high velocity and excellent 6.5mm bullet sectional density provides reliable penetration and expansion on game, making humane kills possible even at extended distances. However, the round is generally not recommended for the largest North American game, like moose or bear, where a larger, heavier-caliber bullet is preferred for consistent deep penetration. Nevertheless, experienced reloaders appreciate its flexibility—lightweight, fast bullets offer mild recoil and flat shooting for varmints and predators, while heavier bullets extend the cartridge’s capability into the realm of elk and similar game.

Typical bullet weights for the .264 Win. Mag. range from 85 to 160 grains, with 120- to 140-grain projectiles being especially popular among handloaders for their balanced combination of velocity, trajectory, and terminal performance. Lighter bullets in the 85- to 100-grain range are often chosen for varmints and small game, taking full advantage of the case's velocity potential, while 140- to 160-grain bullets maximize ballistic coefficient and sectional density for longer-range hunting and target applications. The cartridge is characterized by relatively sharp recoil, owing to the powder charge and velocities achieved, and it has a reputation for above-average barrel wear if not properly managed—something reloaders with attention to barrel longevity and maintenance can mitigate. Overall, the .264 Winchester Magnum, though perhaps not as widely recognized today as some of its contemporaries, remains an outstanding option for reloaders interested in the maximum performance potential of the 6.5mm caliber, offering a unique blend of history, capability, and ballistic excellence.