Buffalo bore's heavy 40 s&w +p load uses flash suppressed powder that gives high velocities at low pressures for a potentially life saving advantage.More than 90 percent of all human shootings in the usa happen in low light, and you don't want to be blind after you fire one shot in a life threatening, high stress situation.Rating: +PCaliber: 40 S&WBullet Type: Jacketed Hollow Point (JHP)Bullet Weight: 155 grMuzzle Energy: 582 ft lbsMuzzle Velocity: 1300 fpsRounds Per Box: 20Boxes Per Case: 12Application: Home DefenseCasing Material: BrassHazair: Yes