Does your wife have a sister?
Just kidding.
I have a 7mm Ultra Mag and I reload my own ammo. My Rifle is a Remington 700 bdl ss with a 26" barrel. So far it really likes two different loads with a 140gr Nosler Partition bullet.

Load #1
88 Grains of IMR 7828 with an OAL of 3.60
Groups are .75 and better

Load #2
90 Grains of IMR 7828 with an OAL of 3.60
Groups are .6 and better
This load may seem hot but I have not seen any pressure signs

I also have tried 4831 but gave up because of poor groups and pressure signs
I would get her a good recoil pad so she does not develope a flich, in other words it does kick.
Good luck and stay safe.

GOD HAS BLESSED AMERICA!