I still shoot the .22 I found under the Christmas tree when I was 12.

15 or 20 years from now, it may still be her favorite, or only, rifle. (unless she's very petit, you may have added a spacer between the stock and recoil pad so it still fits her). She may be living far away, but she may still want to and be able to hunt.... she might not want to reload.

Walmart will likely still have 7mm-08.

6.5 Creedmoor will still likely be a niche target round.

just my thoughts

Poole