Do Weather Conditions Affect .300 PRC Performance on Elk?

Wind Resistance Impact

Wind resistance is a significant factor when hunting elk with a .300 PRC rifle. At long ranges, even moderate wind speeds can affect bullet trajectory, causing it to drift off-target. For example, a 10 mph crosswind can result in a 2-3 MOA drift at 400 yards. To mitigate this, use a high-quality ballistic calculator or a rangefinder with wind compensation to determine the correct holds. Aiming for a 10 MOA hold for every 10 mph of crosswind is a good starting point.

Temperature and Expansion

Temperature can also affect the performance of .300 PRC cartridges on elk. At higher temperatures, the bullet’s expansion is reduced, resulting in a larger diameter and potentially deeper penetration. Conversely, at lower temperatures, the bullet’s expansion is increased, resulting in a smaller diameter and potentially a more effective stop. A temperature range of 40-60°F (4-15°C) is considered optimal for .300 PRC expansion on elk. In extreme temperatures, consider adjusting your shot placement or using a different cartridge.

Ballistic Performance

The .300 PRC cartridge is designed to excel at long ranges, with a flat trajectories and high ballistic coefficients. However, its performance can be affected by humidity, which can cause the bullet to lose velocity and accuracy. A 100% RH (relative humidity) can result in a 1-2 MOA drop at 400 yards, while a 50% RH can result in a 2-3 MOA drop. To compensate for this, use a ballistic calculator or a rangefinder with humidity compensation to determine the correct holds.