What impact does wind have on .308 accuracy for elk?

Wind Drift and Its Effects on .308 Accuracy

Wind drift refers to the sideways movement of a bullet due to wind resistance. For a .308 Winchester, the amount of wind drift depends on the bullet’s weight, shape, and velocity, as well as the wind speed and direction. At 400 yards, a 10mph crosswind can cause a .308 bullet to drift 2.2 inches per 10mph of wind speed. This can be a significant factor at longer ranges, making it essential to factor wind into your calculations.

Minimizing the Impact of Wind on .308 Accuracy

To minimize the impact of wind on .308 accuracy, hunters can use various techniques, such as shooting from a windbreak or seeking cover from the prevailing wind direction. Another approach is to aim slightly into the wind to compensate for the expected wind drift. The amount of compensation depends on the wind speed and range to the target. For example, at 400 yards with a 10mph crosswind, you would aim 2.2 inches into the wind to compensate for the expected drift. This technique requires practice and experience to master.

Choosing the Right .308 Ammunition for Elk Hunting

When choosing .308 ammunition for elk hunting, consider factors such as bullet weight, shape, and velocity. A heavier bullet with a higher ballistic coefficient (BC) will tend to resist wind drift better than a lighter bullet. For example, a 168-grain .308 bullet with a BC of 0.500 may perform better in windy conditions than a 140-grain bullet with a BC of 0.450. Additionally, consider using ammunition designed for long-range shooting, such as those with specialized tip designs or advanced propellants. These can help mitigate the effects of wind on .308 accuracy.