What ever you get her, make sure it has a decent recoil pad. My 9 year old shoots her sister's .243 handirifle and thinks its a blast. It is not always the caliber. The weight of the gun has a big influence. Is she snugging it in tight to her shoulder? I've shot one 30-30 that kicked like my .06. I've also shot a 300 mag that didn't kick any worse to me than the .06. I assume she shoots with hearing protection, but the anticipation of the report may be as responsible for flinching as the kick. This is something to consider with a muzzle break.