7mm PRC or .308 Winchester — which is better for elk?

Effective Range and Ballistics

The 7mm PRC offers a flatter trajectory and less wind deflection compared to the .308 Winchester, making it a better choice for hunting elk at longer ranges. The 7mm PRC’s typical ballistic coefficient (BC) is around 0.6-0.7, while the .308 Winchester’s BC is usually around 0.4-0.5. This means the 7mm PRC will retain more velocity and energy at 500-600 yards, giving hunters a better chance of making a clean, quick kill.

Penetration and Expansion

The 7mm PRC’s larger calibre and heavier bullet weight (typically 160-190 grains) also provide deeper penetration, which is critical for elk hunting. Elk are large animals with thick muscle and bone, and a bullet that can penetrate 18-20 inches is necessary to ensure a clean kill. The 7mm PRC’s larger diameter also allows for a more efficient expansion, transferring more energy to the target and increasing the chances of a quick and humane kill.

Real-World Performance

In real-world hunting scenarios, the 7mm PRC has proven itself to be an effective choice for elk. For example, a 7mm PRC loaded with a 175-grain bullet and a muzzle velocity of 2950 fps has been reported to achieve a 20-inch penetration in a 10% gelatin block, while a .308 Winchester loaded with a 150-grain bullet and a muzzle velocity of 2800 fps achieved only 12 inches of penetration. While both cartridges can be effective, the 7mm PRC’s superior trajectory, penetration, and expansion make it a better choice for hunting elk.