Is the penetration of copper bullets sufficient for large game?

Expansion and Penetration

Monolithic bullets, often made from copper or copper alloys, are designed for deep penetration. Their high ballistic coefficient and lack of fragmentation allow them to maintain kinetic energy and penetrate tissue effectively. When shot placement is accurate, these bullets can penetrate up to 30 inches (76 cm) in large game, depending on the caliber, velocity, and angle of incidence.

Real-World Examples and Calibers

For example, the 7mm Remington Magnum and .300 Winchester Magnum calibers, using monolithic copper bullets, have been shown to penetrate 25-30 inches (63-76 cm) in a variety of large game, including elk and moose. In the 6.5mm Creedmoor caliber, these bullets have consistently penetrated 20-25 inches (51-63 cm), but can reach 30 inches (76 cm) or more with a well-placed shot. The key to deep penetration is expanding the bullet, which requires sufficient velocity and a suitable caliber.

Factors Affecting Penetration

Factors like velocity, angle of incidence, and shot placement greatly impact the penetration of copper bullets. Shots taken from the front or at shallow angles result in less penetration due to the reduced kinetic energy imparted to the bullet. Conversely, shots taken from the side or rear can result in deeper penetration. Therefore, hunters must carefully choose their shot placement and consider the variables that affect bullet penetration to ensure a clean and humane kill.