You want a long barrel. I would say 28" or so and 10 twist.
I would go for a varmint contour personally.

With that you should be able to launch 208 gr amaxes over RL17 at 2850-2900 fps.

That will get you out to 1500 yards and still be supersonic.

I would do a SS long action, maybe have it timed and trued, machined recoil lug, good stock and bed it like a medalist or other with a good recoil pad.
Farrel base, extreme rings. Very high end scope. SSS trigger.

That should do it.