This subsonic 9mm Parabellum/Luger ammo was designed to fill the need for full power, suppressible ammo. While this ammo is full power, it is standard pressure and falls within the SAAMI guidelines of 35,000 PSI, for use in ALL 9mm handguns, suppressed or otherwise, and will not cause accelerated wear in your firearm. This is enough penetration to incapacitate even very large men that are heavily clothed and are struck at bad angles. For those wanting an easy shooting, full power, standard pressure 9mm load that will penetrate deeply and is designed for all 9mm pistols, this is it. Specifications: 9mm Luger Subsonic/147 gr/Full Metal Jacket Flat Nose (FMJFN)/20 Per Box/12 Cs