Is there a performance difference in copper bullets by climate?

Temperature and Expansion

Copper bullets are known for their ability to expand upon impact, creating a larger wound channel and increasing the chances of a clean kill. However, this expansion can be affected by temperature. In warmer climates, the expansion of copper bullets can be significantly reduced, leading to a smaller wound channel and decreased effectiveness. This is because the increased heat can cause the copper to become softer and less dense, reducing its ability to expand. In contrast, cooler climates with temperatures between 40°F and 60°F (4°C and 15°C) tend to allow for more accurate expansion and penetration.

Monolithic Bullets and Climate

Monolithic bullets, which are made from a single material, such as copper, tend to perform better in cooler climates due to the reduced expansion and increased penetration. These bullets are often used for hunting larger game, such as elk and moose, and are designed to create a large wound channel. In warmer climates, the reduced expansion of monolithic bullets can make them less effective, as the bullet may not be able to create a large enough wound channel to ensure a quick and humane kill. In these cases, bullets with a harder core or a copper jacket may be more effective.

Hunting in Hot and Humid Climates

When hunting in hot and humid climates, it’s essential to consider the temperature and humidity when selecting a bullet. In these conditions, bullets with a harder core or a copper jacket may be more effective, as they are less likely to expand and lose their kinetic energy. Additionally, hunters should consider using a slower twist rate barrel to help stabilize the bullet and maintain its accuracy. This can help to ensure a clean and effective kill, even in challenging environmental conditions.