That will work, if you're using a bazooka. (lol)
Are you going to use that crossbow setup?
In any event (gun or bow) best thing you can do is right behind the shoulder blade in a quartering away shot. Sort of like aiming at the opposite shoulder.
Most hunters accomplish this by setting up the bait behind a kind of angled wall of snags and downed timber so the bear has to go to the bait away from the shooters advantage point.
My brother-in-law shared a fireside story with us several years ago about how he and his hunting partner shot a black bear right between the eyes. The bear went down like a wet card table. But when they were field dressing it, they noticed the heart was still pumping!!
They had just knocked it out!!!