Muzzle Velocity: 1020 ft/s
The speed of sound on a standard day is about 1080fps. Anything below that will normally be subsonic. Of course, different temperatures, barometric pressures, and humidity can change the speed of sound. I'm assuming these will be subsonic.
Roughly weight after 150 grs are subsonic velocity. You need to see that info on the box for confirmation! The printed ballistic info doesn't even matter if your setup and environment (bbl length, gas port size, temperature and humidity etc.) isn't basically what was used for the test.