FWIW, she shot her last critter with her hubby's .300WSM. When she starts looking for a longer range hunting rifle, I'm not at all sure what to recommend. The availability and options for factory ammo will be far more important than any potential differences in accuracy - those differences are swamped by other factors including differences in rifle, trigger, barrel quality, chamber dimensions and so on.
The only thing I know for sure is it will be another lefty, which limits rifle options considerably. May end up with a semi-custom built from parts.
6.5 Creedmoor checks all those boxes...
John