If Mom liked the one the instructor had.....
ask the instructor specifically what it was...
and get her that.
My first and my last suggestion
as many of you know [these days]
would be a .327 Federal Magnum.
[despite some that ridicule me.....
I stand my ground.
Shoot .32 H&R's and .327 Federal.
And you can load Mom's rounds.
Many nice choices in arms.