I don't mean to miss the point of your topic, but if she enjoys shooting rifles and isn't so keen on shooting pistols and isn't going to carry anyway, would you ever consider a pistol caliber carbine?
I used to have a CX4 Beretta carbine before. It has more recoil than a 223. So, be aware of this if ya go for pistol caliber carbines. I mean, its not bad. But, the first time I fired one, I was surprised at the recoil - thinking it would be less since it is a rifle. Just pointing this out, since its for a female