You won't need any special rails or cant to shoot 30-06 at 500 yards, as with a BDC reticle and a scope not designed for dialing in elevation, just zeroing. You will likely just be using the BDC reticle 500 yard mark at 0 MOA.

You won't likely be shooting it 1 MOA, the rifle or that optic, but you can hit minute of man with it and not too much trouble.

Plug in the reticle and your ballistics into Strelok and you it will show you the exact distances each mark reaches, as well as where to hold to hit the distance you want.

As for which mount option, I really liked the DNZ Game Reaper single piece mounts for my R700s. They're $42 or so and do the job.