How to read the wind when shooting with 7mm PRC?

Understanding Wind Direction

When reading the wind with a 7mm PRC, start by observing the direction of leaves, branches, and dust devils at different elevations. Begin at the base of the terrain, where wind direction is often more consistent. Note the direction of any wind streaks on snow or sand, as these can be a reliable indicator of wind direction. Aim to identify wind direction at three different levels: ground level, mid-elevation, and ridge top. This will help you determine if wind direction changes at different levels, which can significantly impact your shot.

Accounting for Wind Velocity

Once you’ve determined wind direction, estimate wind velocity by observing the speed of leaves, branches, and dust devils. In general, a moderate wind velocity is around 5-10 mph. If wind velocity is higher, it may be difficult to hold a steady shot with a 7mm PRC, especially at longer ranges. To compensate for wind velocity, use a ballistic calculator or consult a ballistic chart to determine the necessary holdover. As a general rule, for every 1 mph of wind velocity, hold over an additional 1.5-2 inches at 400 yards with a 7mm PRC.

Applying Wind Data to Your Shot

When applying wind data to your shot, consider the orientation of the terrain and the elk’s position. If the elk is downwind, you may need to adjust your shot to compensate for the wind deflection. For a 7mm PRC, wind deflection increases with range, so it’s essential to factor wind deflection into your shot at longer ranges. At 400 yards, wind deflection can be up to 2-3 inches with a moderate wind velocity. Use your ballistic calculator or ballistic chart to determine the necessary holdover and wind deflection, then apply these corrections to your shot.