Jargon is a type of language that is used in a particular context and may not be well understood outside of it. The context is usually a particular occupation (that is, a certain trade, profession, or academic field), but any ingroup can have jargon.
- JHC Jacketed Hollow Cavity
Stands for Jacketed Hollow Cavity, a proprietary name used by Sierra Bullets for their line of Jacketed Hollow Point bullets.
- 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 Jacketed Soft Point
Stands for Jacketed Soft Point, a type of bullet with a soft lead core enclosed by a hard metal jacket (usually an alloy of copper), but with the nose section exposed to ensure bullet expansion.