Quick Answer
To set your ballistic app to account for wind drift, you'll need to input your rifle's muzzle velocity, bullet weight, and the angle of the wind, then use the app's built-in wind drift calculator to determine the correction. This correction is usually expressed as a minute of angle (MOA) or milliradian (mrad) value that you can apply to your shot.
Understanding Wind Drift
Wind drift occurs when the wind exerts a force on the bullet, causing it to deviate from its intended trajectory. To calculate the wind drift, you’ll need to know the muzzle velocity of your rifle, the weight of the bullet, and the angle of the wind. A general rule of thumb is to use a wind speed of 10 mph (4.5 m/s) and a wind angle of 90 degrees (perpendicular to the bullet’s trajectory). For example, if you’re shooting a 150-grain bullet at 3,000 fps (914 m/s), a 10 mph wind at 90 degrees will cause the bullet to drift about 4.5 inches (11.4 cm) per 100 yards (91.4 meters). Your ballistic app will allow you to input these values and calculate the wind drift correction.
Setting Up Wind Drift in Your Ballistic App
To set up wind drift in your ballistic app, follow these steps: (1) input your rifle’s muzzle velocity (in ft/s or m/s), (2) select the bullet weight (in grains or grams), and (3) enter the wind speed (in mph or m/s) and angle (in degrees). Your app will then calculate the wind drift correction in MOA or mrad. For example, if your app calculates a wind drift correction of 2.5 MOA at 100 yards, you’ll need to adjust your aim by 2.5 minutes of angle at that distance to compensate for the wind. Make sure to adjust your aim accordingly and verify your shot placement to ensure accuracy.
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