How does temperature affect the performance of 6x47 Lapua loads?

Temperature-Sensitive Ballistics

The 6x47 Lapua cartridge is known for its accuracy and versatility in varmint hunting. However, temperature fluctuations significantly impact its performance. For every 10°F decrease in temperature, velocity drops by about 1-2 ft/s, affecting the trajectory and energy transfer to the target. This is due to the increase in air density and the reduced efficiency of the combustion process.

Bullet Selection and Weight

When hunting varmints, the choice of bullet weight and type is crucial. In the 6x47 Lapua, bullets weighing between 80 and 115 grains are common for varmint hunting. The lighter bullets, such as the 80-grain Hornady V-Max, tend to be more temperature-sensitive, while the heavier bullets, like the 115-grain Sierra MatchKing, are more stable. For optimal performance, it’s essential to choose the right bullet for the specific temperature range you’re hunting in.

Hunting Tips and Considerations

In cold temperatures, it’s essential to compensate for the reduced velocity by adjusting your aiming point. This means holding high and to the left (for a right-handed shooter) to account for the bullet’s longer trajectory. In hot temperatures, the opposite is true – hold low and to the right to compensate for the bullet’s shorter trajectory. Additionally, consider the wind direction and speed when hunting in extreme temperatures, as the bullet’s trajectory can be affected even more significantly by wind resistance.