JHP

A Jacketed Hollow Point, or JHP, bullet is a bullet designed to expand when it enters its target. When a JHP bullet hits its target, a ring of lead surrounding the bullet rapidly expands into a mushroom like shape, which can cause considerable damage to soft targets. JHP bullets do not penetrate armor well, In Fallout this is reflected by having JHP bullets do more damage to a target,but having subpar armor penetration. This means that although you may hit a target for 18 damage, thier armor may very well absorb a good deal of it.