I live in Wyoming and a lot of young hunters here started hunting mule deer with the 243 . A good 6mm will and has taken a lot of mule deer . Go to the range a lot with her practice setting shots without the bench do some prone , setting and shots that are at angles side to side as well as up and down if you can . It seems that people tend to just shoot from the bench but you sometimes have a need to work on the scenarios that will be encountered in the field if you can get access to hunt P-dogs or ground hogs ect .that will give better real world hunting experience . Use this opportunity to get out with the family and enjoy the out of doors while tuning the hunting shot skills. If you need to post an add to help find a farm or ranch that you can hunt or shoot on to help train your young ones . Explain that you are trying to help them get trained to go on a hunt and are wanting to get real world experience there should be someone willing to help with that , that has a range on their land