American Eagle AE9SJAP1 Syntech Action Pistol Flat Nose 150 Grain 9mm Luger/Parabellum

Of all the subsonic 9mm I've shot through my suppressed Beretta M9A4, these are the quietest and cleanest. A little pricier than other heavy weight 9mm, but if you have a gun you cherish, it's worth paying a little extra to use ammo that keeps your barrel in good condition.