Surefire does not make centerfire pistol silencers, JA Ceiner has been out of the silencer business for like 15yrs now.
147gr 9mm ammo is not downloaded weak ammo. Just like 230grain 45ACP it is full power ammo that travels below the speed of sound. Using 124gr +p ammo would not hide the fact that a gun shot had happened and would be uncomfortable to shoot. So not much point in using that.