Were I looking at getting a special rifle for the hunt it would be either a 7-08 or a 7x57. It would be using a TTSX in either 120 or 110gr weight for the actual hunt.
To teach her how to shoot it well I would load hundreds of squib loads and have her shooting EXACTLY the same rifle she will hunt with. She would shoot at least a box a day off the bench at paper to let her know the rifle will place bullets in TINY groups, exactly where she aims.
At the same time she would be shooting far more rounds at all sorts of targets at all sorts of distances... clay pigeons work very well for long range, accessible targets.
And shooting sticks would see a lot of use...
Phuque porting!!!!!!!!!!!!!!!!
Full bore loads would be introduced at the hunt, only! She will have no clue after shooting her Kodiak bear that the loads she shot in practice were less than the loads she just shot her magnificent bear with.
