When Are Expanding Bullets Ineffective for Big Game Animals?

Limited Expansion Range

Expanding bullets are designed to expand upon impact, but this expansion is limited to a specific velocity range. At very close ranges, bullets do not have enough time to expand, and at very long ranges, they may not have enough velocity to expand properly. For example, a .30-06 Springfield bullet that expands at 2500 fps may not expand at all if fired at 500 fps, which is typical at close range.

Dense Bone Structures

Some big game animals, such as bears and bighorn sheep, have dense bone structures that can prevent expanding bullets from functioning as intended. These animals’ bones are often thicker and more compact than those of other big game species, making it difficult for expanding bullets to penetrate and expand. In such cases, a non-expanding bullet or a bullet with a more aggressive profile may be more effective.

Additional Factors to Consider

Other factors can also affect the effectiveness of expanding bullets, including the animal’s size, angle of impact, and the presence of thick hide or muscle tissue. Hunters should carefully consider these factors when selecting a cartridge and bullet type for a particular hunt.