Well, I learned what I pretty much already knew. The .300BO is pretty much a waste of a chambering, shooting suppressed. I didn't have any pigs come in, but I shot 5 coons, and should have had probably 3 more.
I have 3 problems with it:
First, it has the trajectory of a thrown stone. I'll need to hone up on the ballistic holds, but you pretty much need to be a long-range computational wizard to deal with the arc of that sucker. 15 yards longer or shorter than your zero and you better get factoring that in.
Second, even though it's quiet and I'm using a Dead Air Nomad 30 can with an e-brake, it still makes enough noise that the game runs from it. Not quite the same as unsuppressed, but they still know to get out of Dodge. I find this with full speed calibers too, when hunting hogs, that they hear it, but they're just a little slower in figuring out what direction to run.
Third, anemic. I'd be hesitant to shoot a large hog unless I had the perfect shot.
The bottom line (and I surmised this already), the .300 BO sub-sonic is a novelty with no real practical hunting use IMO. I'd rather blast away with a .223, .260, 6.5 or .308 and be sure of my ballistics and terminal performance.
It's fun as heck to shoot, but I like performance for hunting, and it lacks in that cartridge. Once again, I was reminded of how/why I landed on the chamberings I already shoot for most game.