This is sort of Is the Pope Catholic sort of question. Just about any 300 something and about any bullet over 150 grains will take elk, add in the monos and anything over 130 grains is skookum.

"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