Having seen what a 200 NBT from a 340 Wtby didn't do to a middling-sized caribou at 50 yards when the bullet struck square in the stomach, I simply would not trust a rapid expander-type bullet for less than ideal bullet placement on a disgruntled bear. (That caribou lost its stomach contents through the wound, but it did not go down until another bullet was placed better.)
Sometimes, the air you 'let in'matters less than the air you 'let out'.
