I can say that a friend AR who has hunted Alaska says 338 cal Failsafes are good on bears and penetrate deeply.They might not expand as much as others and are finicky about what gun shoots them well though.Comments on Barnes bullets would be similar.

A different friend BW swears by the 250 gr partition .The Nosler partition would be excellent and are not as finicky about what rifle shoots them well.The bonded Aframe would seem better yet and would be my preference for penetration/expansion on bears.