Probably the 9.3
I run 250g Accubonds at 2700fps, .497bc
Got a bull elk this year w it
I run 286 western cast lead bullets over trail boss for plinkers
I have an MC Ace chamber adapter to run 9mm Markov for small game
You used to be able to get cheap $20/bx PPU ammo for deer to 250y.
I have a 35 Whelen also, run 225g Accubonds at 2800fps, 0.44bc
There is a bunch of newer powered published loads that make the 35w pretty hot
I have 180g XTP pistol bullets for exploding milk jugs
The 35w sits in the safe usually
You might work on finding a rifle that fits you best, then see what caliber you can get