With a few here--Any 308 will get you there. No need for a bull barrel or heavy barrel. You won't be able to shoot 10 rounds in a row with out a cool down,but accuracy is just as good. As for scope- I am a bad guy to talk to about that. I shoot matches at 1000 yards with a 8-32 x 56. I tell you if I could get into something even stronger ( money thing ).I would not think twice about it.
Im looking at something down the line of the Hubble Telescope