RE: 7x57 for caribou, Bear, and Moose
I agree with your choice of the 160 Grn. Barnes-XLC,
The 7X57 Mauser with 175 Grn. Barnes-XLC bullets would also be an excellent choice, especially involving those big nasty brown bears.
As for moose and caribou, they're not that hard to kill, if a hunter does his part and places the bullet where it needs to go the 7X57 with 150's is a'plenty...