why are you touting the 270 wsm? its not much more than a 270 win. loaded to the same pressure? even the 270 Weatherby leaves a lot to be desired at 600 yards. if you wan't a long range 270 cartridge check the specs on the 277 Allen mag, the 7mm Allen mag, or the 300 Allen exp. the 6.5's and newer 270 bullets are pretty good on the BC scale but the BC does not help a bunch till you get to 700 yards and beyond.
RR