Subsonic with 10.5 9mm AR

I'm currently building a suppressed 9mm SBR. Because of the laws I'm going with a 10.5 inch barrel. I'd prefer a 5 inch barrel, but oh well. Do factory 147gr stay subsonic most of the time? I reload 9mm, but I like to supplement with factory ammo from time to time.

Subsonic with 10.5 9mm AR