Both the 150 and 165 Fusions have shot really well out of four 30-06s I have tried them in. I have never shot anything with them other than paper.
However, I have read a lot of reviews that mirror the comments of Watipi1, that they are really soft which causes wide expansion and poor penetration. I too would be a little hesitant to try them on elk. Sure they may work, but with the scores of options with proven elk bullets currently available, I wouldn't risk it.
FYI, I have really good luck with Hornady Interlocks (not SST or Interbonds), Barnes Vortx TTSX, and Nosler Trophy Grade Accubond consistently shooting well in my rifles. Any of these would surely serve you well.
Good luck!