Can environmental factors impact AR-15 performance in a hunt?

Weather Conditions and Humidity

AR-15 performance can be affected by extreme temperatures and humidity levels. In high humidity environments, the risk of rust and corrosion increases, which can compromise the firearm’s accuracy and reliability. To mitigate this, apply a rust-inhibiting coating to the firearm and store it in a dry environment when not in use. For hunting in extreme temperatures, consider using a heat-resistant or cold-resistant scope. In hot conditions, consider using a scope with a built-in sunshade to reduce glare.

Barometric Pressure and Wind

Barometric pressure fluctuations can affect bullet trajectory and accuracy. As a general rule, a 1-inch drop in elevation per 100 yards for every 1-inch change in atmospheric pressure. This variation can be compensated for by adjusting the firearm’s sight or using a ballistic calculator to determine the correct windage and elevation adjustments. Additionally, wind resistance can impact bullet trajectory, so consider using a wind-deflection chart or ballistic calculator to determine the correct holdover and windage adjustments.

Terrain and Elevation Changes

Elevation changes can also impact AR-15 performance. For every 1,000 feet of elevation gain, the air pressure decreases by approximately 1 inch of mercury (inHg), which can affect bullet trajectory. Consider using a ballistic calculator to determine the correct elevation adjustments for the terrain you will be hunting in. Additionally, consider using a scope with a built-in rangefinder or a separate rangefinder device to accurately determine distances and make precise adjustments.