https://www.hornady.com/ammunition/rifle/300-blackout-190-gr-sub-x-subsonic#!/
I've 200 rounds of that to try on deer this fall. In the past I've used 110 thru 130 grain for deer hunting, and those bullets have worked well. I also agree if using for personal defense, I would use supersonic loads.
I love shooting my .300 BLK suppressed with subsonic bullets. However, shooting water jugs even at close range with 220 grain 0TM bullets is no fun. The jugs don't explode they just leak from two .30 caliber holes.
