Yeah, decent subsonic 22LR has been really hard to find. I was never impressed with the Remington offering.
rost495, you're right on the lack of Bullseye data, since almost all published 300 Blackout data is meant to cycle an AR. Look at 300 Whisper and 300/221 data; you may not find it for that 194gr bullet, but you can find something close and work down to it. Red Dot is a good one for this too.
Remember to work down with subsonics, particularly jacketed, to avoid sticking a bullet in the barrel.
