I would try to let her shoot different rifles to see how stock fit suits her. I had a Savage and a Tikka in 270 that felt like they kicked more than the Browning 7 Mag I shoot. I also don't like Sako stocks. For me, Remington, Browning and Weatherby stocks are comfortable to shoot. It might be different for her. I have a Rem. 700 Mountain Rifle that is not unpleasant (to me) with 180 gr. bullets.

I like the 7mm-08, but I also have become partial to the 6.5 Creedmoor.