Federal Premium Hydra-Shok .40 S&W 180 Grain JHP Centerfire Ammo has been a phenomenal top-performer since its introduction in 1989! Federal uses an incredibly-strict manufacturing process to insure consistency and accuracy. The notched copper jacket initiates and controls expansion. A center post inside the hollow point aids in providing incredible expansion. 40 S&W 180 grain hollow point Notched copper jacket Center post inside hollow point for enhanced expansion