How do bonded bullets perform at different temperatures?

Temperature Range and Performance

Bonded bullets, such as the Barnes TSX or the Nosler Partition, are designed to maintain their integrity at a wide range of temperatures. However, they can still be affected by extreme temperatures. At temperatures above 110°F (43°C), the bonding agent may begin to break down, causing the bullet to separate and lose its expansion characteristics. Conversely, at temperatures below 0°F (-18°C), the bonding agent may become brittle and more susceptible to cracking, which can affect the bullet’s aerodynamics and accuracy.

Bullet Expansion and Temperature

When shot at various temperatures, bonded bullets may exhibit different expansion patterns. For example, a 7mm Rem Mag bullet shot at 0°F (-18°C) may expand to 1.5 inches (38 mm) in diameter, while the same bullet shot at 90°F (32°C) may expand to 1.2 inches (30 mm). This expansion difference can be critical when hunting large game like elk, where a bullet that fails to expand properly may not provide a quick kill.

Hunting at Extreme Temperatures

When hunting at extreme temperatures, it’s essential to consider the performance characteristics of your bonded bullets. If possible, hunt during the cooler morning or evening hours when temperatures are more stable. If you must hunt during the heat of the day, choose a bullet that is known to perform well in warm temperatures. Additionally, consider the type of game you’re hunting and the shot distance. For example, when shooting at elk at close range, a bullet that expands quickly and retains its weight is essential for a quick kill.