"Big Bullet" refers to a large projectile designed for use in firearms, typically characterized by its size and weight. These bullets are often used in high-caliber rifles and handguns, providing greater stopping power and accuracy over longer distances. The design of a big bullet can enhance its penetration capabilities, making it effective for hunting and self-defense. In the context of ammunition, caliber is a crucial factor, as it determines the bullet's diameter and the type of firearm it can be used with. Ballistics is the science that studies the behavior of bullets in flight, helping to improve their design and effectiveness.