Kevin Thomas who wrote "There is Something about Buffalo" thought very highly of the 380 grain Rhino. It was tested on buffalo in it's initial development and was modified three times to improve performance. They should do even better in the Weatherby. If in a herd situation I would use the Woodleigh but the heavier one may still give pass through.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli