I have both and I really do like the 6 creedmoor, but for me I chose the 6.5 creedmoor. I hunt with all of my rifles and like the extra KE of the 6.5. If I did not reload, the 6.5 creedmoor would be the onlychoice for me. One other thing is that since you do not reload, you will both shoot the same loads in your rifles so you can share ammo if needed. That idea sort of goes out of the window if she decides to do something like shoot the 123s. Either way use a brake on it and she will not have a problem with either.