With 6.5 swede and the 260 loaded to the same pressure the swede has the slight edge, slight. People talk about long vs. short actions, that bolt throw means very little actually. So it comes down to picking your poison.
If I was building a target rifle though, my vote would go to the 260. That simply because I'd make my brass from something else, like '06, so I can turn the necks and fit the case.
Field rifle, toss a coin, it's all about the same.
