My other 1/2 has taken with her Tikka t3 lite 7mm08,mullies,white-tail,coyotes, elk and lots of nasty targets.
She has shot deer with 30-30,270,6.5x55,308,25-06 ,30-06,303,and even a 300win.She has been hunting and target shooting for 18yrs.
The 300win mag gave her a scope scar.
She will punch paper for hrs.with her 7mm08
She likes it because it is lite to carry while hunting ,she can take short to longer shots and likes the accuracy.
She has tried a lot of different rifles and definatly has her preferances .
Talk to some of your local gun nutz see what cal,s brands,models they have and get her to go try them out.(myself i like nothing better than to let someone else try a rifle i have .)you might have to buy a couple boxes of bullets to try them out but finding which one "She"likes will be cheaper and less painful.
That is until she starts spending more time at the range than you do.