Not without testing them first as i've never used them or seen them used. I'm sure the bear would die, but would it break one down, that is what i'd want to know.

I saw a brown bear shot with a .458 with 350 Hornandys and the bullet never exited the rib cage. Same thing with the 400 grain Speer out of a 45/70. I like more penetration than that on big bears.

BTW, A friend of mine who hunted bears a lot saw a brown bear shot with a .458 with a factory 500 grain soft point on a quartering shot, and that bullet didn't exit either.

Drilling Man