My son was 11 when he first got to hunt deer. We spent much range time shooting 70gr (ffg Goex) and a 250gr bullet. Before the actual hunt I took the rifle to the range and sighted it in with the same 250gr bullet, but upped the charge to 90gr.
He got his deer and he never noticed the heavier load.

Good luck to your daughter on her hunt!!!!!!!!!!!!!!!!