How do these two rounds stack up for shooting paper out to 600 yards? Running the numbers through a couple of different ballistics calculators using 140gr bullets the drop and wind deflection are very, very close out to 600 yards. Does one have an inherent accuracy edge over the other? The 6.5 bullets have a higher bc, but the .284s retain their velocity better. In a single shot rifle with a 28-30" barrel around 15-16lbs total weight, what does one offer that the other doesn't? Not going to hunt with this rifle, just targets off the bench. There are many carteridges that will fit this application, but when choosing between these two, which one and why?