JHP Jacketed Hollow Point

Stands for Jacketed Hollow Point, a bullet similar to a Jacketed Soft Point, except that a portion of the nose cavity is hollowed out for greater bullet expansion. A hollow-point bullet is an expanding bullet that has a pit or hollowed out shape in its tip, often intended to cause the bullet to expand upon entering a target in order to decrease penetration and disrupt more tissue as it travels through the target. It is also used for controlled penetration, where over-penetration could cause collateral damage (such as on an aircraft).

JSP_and_JHP_bullets
.357 Magnum rounds. Left: Jacketed Soft Point (JSP) round. Right: Jacketed hollow-point (JHP) round. JSP is a semi-jacketed round as the jacket does not extend to the tip.