You can load the .300 Sav down to 30-30ish or so and save her a bit of trauma. Kills deer just as dead and as she gets older you can up grade the load as time goes by until you're back to .300 Sav. The hurt from the kick is one of the big reasons a lot of kids get turned off from hunting. Getting hurt ain't fun no matter what else you do to make it fun. Reduce the load and she'll thank you for it.
Go tell the Spartans,Travelers passing by,That here,Obedient to their laws we lie.
I'm older now but I'm still runnin' against the wind
