I would go with the 30-36. In my opinion it is the best rifle round ever. It is sutible for all meduim to large sized game in the USA. Check out the Rmington and Savage line of Bolt-action Rifles in 30-36.
Hmmm, interesting...Ive got both. Both are Remington model 700 BDL, the .30-06 is a left hand action(was willed to me by my late father) the other is a RH action .308(same deal)they are both 7.62, but the ought 6, is a 72mm cartridge as opposed to the 52mm or 54...cant remember. length cartridge of the .308 but yes, the bore is the same, the chamber is quite different. As far as accuracy, depends ont he size of nail...the .308 is a tack driver, the ought 6 is a 16 penny nail driver...big nails are good. My next one is gonna be a 300 rem ultramag. Bigger nails are better!