Buffalo bore's heavy 40 s&w +p load uses a 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.Specifications: 40 s&w +p/180 gr/jacketed hollow point (jhp)/20 per box/12 csRating: +PCaliber: 40 S&WBullet Type: Jacketed Hollow Point (JHP)Bullet Weight: 180 grMuzzle Energy: 484 ft lbsMuzzle Velocity: 1100 fpsRounds Per Box: 20Boxes Per Case: 12Application: Home DefenseCasing Material: BrassHazair: Yes