Why the jump from rabbits to Kodiak bears. Are you looking for a rifle that she will eventually use for brown bear? I think that Boogaloo's approach has merit. Work up in recoil slowly. The '06 with a 200 grain Partition would do the job nicely or maybe a 280 with 175s with solid back up. A brake will reduce recoil but at the expense of muzzle blast which can make recoil seem worse. She needs to learn proper shot placement which is of prime importance.