Quick Answer
Yes, environmental changes can affect your zero after tuning, as temperature, humidity, and air pressure variations can alter your rifle's ballistic performance.
Environmental Factors and Ballistic Performance
Temperature, humidity, and air pressure changes can significantly affect your rifle’s ballistic performance. For instance, a 20°F temperature change can cause a 3-4 inch variation in bullet drop at 300 yards. This is due to the changes in air density and the expansion or contraction of the bullet’s diameter.
Effect on Zero and Tuning
To account for these environmental changes, you’ll need to adjust your zero and tuning. First, understand the effects of temperature and humidity on your rifle’s ballistic performance. For example, a 20°F temperature increase can cause a 1-2 minute of angle (MOA) rise in the bullet’s trajectory. Conversely, a 20% increase in humidity can cause a 1-2 MOA drop. To maintain your zero, you’ll need to adjust your elevation and windage accordingly.
Practical Considerations for Environmental Compensation
To incorporate environmental compensation into your tuning process, use a ballistic calculator or consult a ballistic table. These tools can help you determine the optimal zero and elevation settings for various environmental conditions. Additionally, consider investing in a temperature and humidity-compensating scope or reticle, which can help you quickly adjust for environmental changes.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.