Re: daughter wants muledeer gun
Being heavily biased towards the 270 cal and the Win cartridge in particular her are my thoughts.
But first....congrats to you daughter!!!!
If your donor action has at least a 24" barrel.
Much experience can be had by tuning/bedding/trigger work/upgrade and load development.
With a good 140 grain bullet, the proper powder (RL-22 as an example, maybe 7828, who knows, velocities in excess of 3000 fps and possibly much more may be achieved.
If velocity and accuracy are there, the young lady has a very respectful muley rig.
If the thing won't shoot the experience gained will not have been wasted.
Good luck with your choice.
I may be the slowest guy on the mountain . . . . but . . . . I'm on the mountain!