RE: my 7 year old got a new deer rifle.
My 11 year old daughter uses a 7mm-08 that uses the same powder and casing but the bullet size is different and it kicks a little harder but she can handle it just fine.
I know exactlyhow little some kids are prepared but at those young ages ,nerves become a force to overcome so a little bigger caliber is nice to overcome some small shooting errors.
In Ky ,we can use ANY center fire rifle and I have tried the small calibers and just wasn't happy with the .223 or the .243.