Berger 130gr classic hunters. With a BC of .497 a better long range bullet is hard to find. You have to step up to 150gr bullets to get slightly better BC at much slower starting velocities.
As much as I like my 270 win, it is kind of annoying that just a very small diameter difference between it and 7mm bullets appears to consistently provide improved ballistic coefficients.
I am not sure if this is inherent in the diameter or just the nature of the market, but I can't remember seeing 270 diameter bullets with better BCs than 7 mm. Maybe when I re barrel that will be a path.