6,5 Creedmoor or a 264 Win mag if you want a little more velocity. The 264 has less recoil than a 7 rem mag in the same rifle in my opinion. If you go with 120grain bullets it's tame to me. My 14 year granddaughter shoots the Creed easy and ain't scared of the 264 with 120's. she is about 95 lbs. if I could have only one I'd go the 264 route. I have several Sako's and a couple pre 64's. It would be great if you knew guys that would let you try their rifles. The Savage Predator Hunters are fine rifles in 6.5 or 260. Join the 6.5 club. The 26 Nosler is cool too. It will carry a long long way.