What characteristic is unique to hollow-point ammunition?

Hollow-point ammunition is specifically designed with a hollowed-out shape at the tip of the bullet, which plays a critical role in its performance upon impact. When a hollow-point bullet strikes a target, air enters the hollow cavity, causing the bullet to expand. This expansion increases the diameter of the bullet as it penetrates, creating a larger wound channel and thus a more effective transfer of energy to the target. This characteristic aids in minimizing the risk of over-penetration, which makes hollow-point ammunition particularly appealing for self-defense situations, as it is less likely to pass through the intended target and potentially harm bystanders.

While other types of ammunition focus on penetrating deeper or include various materials for different purposes, the expansion feature of hollow-points distinctly sets them apart, ensuring that they maximize stopping power while minimizing collateral damage.