Well back to .270 vs The much superior 6.5-06 there aint much difference under 500 yds and like Bob said there aint much difference after 500 yds but the 6.5 is just so much cooler especially since I am in the process of building one now. Truthfully I should of built a 6.5-270 so I wouldnt have to trim .010 off the .270 brass but at least Im cool now.
