The only time i had that.happen was when I.bought a win mod 70 in 30-07
Came with loaded ammo
Cycled fine.in the mod 70
Would not cycle in my sako 85 30-06
Marked the casings mod 70 only
Have not fired them yet
Good luck.be safe
Never used one, never had a problem
Guess i am lucky my form is ok
And i am 74 years old now
Maybe it was my military and gun club shooting when i was young lol
Have you checked her eye dominance?
She may be left eye dominant??
My ex wife had that problem so once we found that out the problem was solved with the buttstock being altered
Or shoot left handed but she could not do that
Good luck in finding a solution
She looks as if she.is holding the butt...