Since her shots will not be more then 75 yards, you have powerbelts, and powder, and you do not want something that would kick or scare her, I personally would start her out with 85 grains of Pyrodex RS and a powerbelt. That should give you good accuracy and good penetration. I personally would not exceed 100 grains. I shoot a CVA Staghorn and 90 grains of Pyrodex RS and a powerbelt is a deadly accurate combination.

As for the XTP start with the same powder charge of 85 grains.. again it should give good accuracy and good killing power..

Good luck to her and you for that matter...