While I agree with everything you state, and I think professional training is the absolute single best money you can spend on this sport, if she's already mentally given up on the cartridge, it's not going to get any better going forward.
Recoil can be one of the best teachers, it highlights and illuminate our flaws as shooters. I'm a big advocate of using a .308 for a training rifle over a .223, but if someone is pretty recoil sensitive, it can also be a barrier.
One of the quickest ways for me to get my wife to hate shooting is to have her shoot my .308. Yes, I can spend thousands on getting her professional training, but she just wants to shoot to have fun. A heavier recoiling rifle is not at all conducive to that.
I'm keeping it short since: Interwebs. There is a lot of context taken into consideration that I'm not writing about...
Good. But... A rifle course might have several different rifles to choose from and is not, usually, held by the persons "significant other".
Me too. Heavy bullets and no muzzle device for practice. On with the can for comps.
And when she's better than the OP and says "This was fun. I want to try 800!"
"Sorry hon'. That pea shooter ain't gonna cut it"
?
I do get your point though...
Kinda doesn't make sense when you also say to let her pick the rifle.
So how doesn't her trying out a rifle to fit her make sense?
Tikkas hunting stocks are not made for prone shooting. The UPR and Sporter are better but none of them takes weights.