Atomic Ammunition 10MM 155 Grain 20 Rounds JHP Features: Atomic ammunition knows that in the real world we shoot using real guns not test barrels in a laboratory. This is why Atomic is committed to providing you real world data instead of misleading info from test barrels. All of the external ballistic information that is obtained is done so using common firearm that you either own or use. This is the most accurate and useful information on the market. Next time you are in need of some defensive ammo give Atomic ammo a try you won t regret it. Atomic Ammunition 10MM 155 Grain 20 Rounds JHP Specifications: Caliber: 10mm Manufacturer: Atomic Ammunition Bullet Type: JACKETED HOLLOW POINT Manufacturer Part #: 04867 155GR 20RD