Have you noticed more people shooting subsonic CNC? I've tracked 3 deer shot with the same 8.6 shooting subsonic 450gr bullets. One was a miss, one showed back up on camera and couldn't tell where it was hit and the one today got up and smoked us about 1,400 yards into the track. All of them have been shot from 200ish yards. Pretty positive the bullets aren't penetrating much if any at all. I've tracked a few 300 blackouts shooting subsonics but close shots no pass throughs and no blood but found them
Rule of thumb for hunting with subsonics has always been around 100 yards, preferably less. Closer the better. A 285 gr 8.6 shows 940 to 1020 at the muzzle. A 450 gr would be an even worse/slower hunting choice for shooting anything period, IMO, and especially over 100.. Sounds to me like someone got a cool new target rifle and is not using it in a proper application.
I tried telling him that last year but you see how that's working out