cajun47 didn’t ask how to kill a bear; he asked what would equal a bear skull. How he goes about actually killing a bear is up to him.
Rangefinder gave as good a suggestion as I can think of. Back in my younger days when we killed and butchered our own hogs I recall that we used a .22 rifle at about two feet with the hog at a trough eating to keep it still and a shot right between but slightly above the eyes. Half the time it did not kill the hog but merely torqued it to no end as it ran to the other side of the pen.
This, of course, ensured that the hog was definitely NOT going to answer to, “Here, piggy, piggy!” anymore that day.
The next action was to shoot the hog at a distance. The distance was determined by the size of the pen because the hog now knew what that long stick-thing could do and would rapidly place itself at the opposite side from whomsoever had possession of the long stick-thing.
Meanwhile. Momma is shouting, “If you’re going to chase that hog all day you might as well forget any butchering today because that meat won’t be worth two cents after running all over the pen!”
Then the designated “marksman” would let the hog calm down and with a deliberate aim shoot the hog in the ear from across the pen. This meant we kids then had to drag that hog through all the crap (literally) in the pen to the gate and wash it off with water buckets (this was before REA and electricity and well pumps and water hoses) before scalding it in the barrel.
Ah, yes! The “good ol’ days”!
So,
Get a fresh killed hog skull `cause them hogs just might be harder to kill than a grizzly.