Which type of projectile has a hollow body?

The choice of target practice (TP) projectiles being characterized by a hollow body is accurate due to their specific design intended for training purposes. These projectiles are often constructed with a hollow cavity to facilitate minimal cost and safe training environments. The hollow body can also reduce the weight of the projectile, allowing for easier handling and reducing potential hazards associated with the use of more lethal munitions.

Target practice projectiles are not designed for combat effectiveness but rather to provide a realistic training experience. The hollow design allows for a significant reduction in the amount of explosive or destructive material compared to combat munitions, thus ensuring safety for trainees and in practice environments.

Other types of projectiles listed, such as armor-piercing, high explosive, and incendiary projectiles, are designed for specific combat applications and typically contain solid cores or specialized filling that enhances their lethality and effectiveness against targets, meaning they do not have the same hollow characteristics as target practice rounds.