WHAT TO USE
If you already have the 30/30, imho, you're all set!
I have stuck by my 30/30 Marlin so long, most of my huntin' pals are using it again also. East Ky. hills, longest shot ever 150 yds.
There is no recoil to bother her, to speak of, and the 150gr. hp's just drop them with no fuss.
Like some of the other guys, I agree the .243 is a great way to introduce youngsters and women to bolt guns.
I started my nephew with a Rem youth model 7 last fall. He only weighed 75 lbs. and the .243 didn't bother him at all.