Quick Answer
To zero an AR-15 for deer season, use a 100-yard shooting range and a 55-grain or heavier bullet at a minimum velocity of 2,700 feet per second. Set the rifle to target 12 inches high at 100 yards. Then, adjust the sight to where the bullet impacts.
Choosing the Right Ammunition
When selecting ammunition for your AR-15, consider the ballistic coefficient, weight, and velocity. Opt for a 55-grain or heavier bullet, as it provides better penetration and expansion on larger game. Look for ammunition with a minimum velocity of 2,700 feet per second to ensure effective expansion at longer ranges. Some popular options include the Hornady 62-grain InterLock and the Federal 69-grain Power-Shok.
Zeroing at 100 Yards
Begin by setting your rifle to target 12 inches high at 100 yards, using a 24-40 power scope or a red dot sight. This allows for a comfortable adjustment range and helps to ensure accuracy. Use a 100-yard target with a bullseye and an aiming point 12 inches high to make adjustments. Shoot multiple groups to ensure consistency and accuracy.
Final Adjustments and Testing
After zeroing at 100 yards, test your rifle at longer ranges to ensure accuracy and penetration. Use a chronograph to verify your rifle’s velocity and ensure it meets the minimum requirements for effective expansion. Shoot at different angles and elevations to test your rifle’s performance in various scenarios. This will help you fine-tune your shot and ensure success in the field.
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