Amazing to me how radically different bullets perform for different people. My son has shot quite a bit with the 80gr TTSX in a 25-06. Even a brown bear. Total penetration and mostly DRT.
I have only watched about 30-35 Accubonds used and have yet to see a pass-through, even on smallish stuff. Watched a Kodiak bear take four 270gr Accubonds in the ribs from a 375H&H... all were caught.
A lot more questions than answers...
And you let him shoot a big bear with an 80 grain bullet? Isn't that like letting a kid play on an LA freeway?! Haha
Not really a stunt and he is an adult, so he got to choose. The bear was not really much more than a monster black bear for size... 150 yards broadside and unaware.
Having dunked that skull in a shrimp pot, I'll just say I would be amazed to see a black bear skull that size.
Regarding cull hunts, I think a Berger VLD would work well.