Hi go with the 7mm Ultra with a 8.5 twist it will stabalise the 200gr Wildcats as mentioned if you are even thinking of Game beond 600 yards forget the 6.5-284 they are accurate but they do not have the energy at that distance. If you want a real long range rifle look at the 270 Allen Mag that would be awsome in yout rifle with the 196gr Wildcats. Both of these are true long range hunting rifles back to 1000 yards+.
If you intend to do a lot of shooting another round to look at is the 338-300 Ultra mag the 338Edge. It launches the 300gr Sierra MatchKings around 2900fps in a 30" barrel i would fit a muzzle break on any of these calibres but the 338 will give you a longer barrel life and they are verry easy to load for.
What Savage action do you have does it have the 1 1/16" tennon or the 1" one if it has a 1" tennon dont fit any Ultra MAg barrel get another action to start with.
Cheers Bill
Australia
If you intend to do a lot of shooting another round to look at is the 338-300 Ultra mag the 338Edge. It launches the 300gr Sierra MatchKings around 2900fps in a 30" barrel i would fit a muzzle break on any of these calibres but the 338 will give you a longer barrel life and they are verry easy to load for.
What Savage action do you have does it have the 1 1/16" tennon or the 1" one if it has a 1" tennon dont fit any Ultra MAg barrel get another action to start with.
Cheers Bill
Australia