Hollow Point

A type of bullet that has a lead core and a swagged jacket but leaves the front portion of the projectile exposed. Within the exposed lead is a cavity that can be as much as 2/3 the diameter of the bullet. The purpose of the cavity is to initiate rapid expansion of the projectile on impact there by creating a larger wound cavity,earlier into the penetration depth. As a bullet expands, the wound cavity grows generating more shock and tissue damage. A hollow point projectile can double in diameter if properly designed. For example, a .40 caliber round can become over 3/4 of an inch in diameter after being fired into a "soft" target( I.E. living tissue)