RE: 7yr daughter Rifle
I started out with a 22-250 in Texas around the same age. My dad got one with a varmit barrel to cut down on the recoil. As long as you don't have to carry it far look at making the gun heavy to reduce recoil. Later on my dad used this one to plink prarie dogs. Never any problem on the deer. Lots of energy in that fast projectile.