Get him on the range and find the load it shoots best...no worries it will get the job done if he does! I have only killed one bear using a CF and it happened to be a .270 using 130gr Hornady Interlock he rolled over and scampered a little ways before giving up the ghost. Equally the other bears I have harvested with either 50cal ML or most by way of bow/arrow, just put it in the lungs and tag your animal. You may want to consider trying a 150 Gr Nosler Part or similar bullet, just for a bit of insurance. I assume he is new to bear hunting and like many have hard time grasping where and when to pick their shots, a bit better constructed bullet will ensure if he hits the big shoulder blade of boar it will get through to his vitals. It would also be helpful to get him to research the bears anatomy so he can better understand what needs to be done, they are not hard to kill with a rifle but very different anatomy to that of a deer or such and the last thing you want to have to do is track a wounded boar!