Results on game IME - identical. Both will get the job done. Personally - I like 6.5s and left the 708s for the 260.
As Rancho sd - handload 260, you get a tad less recoil w/130s in 6.5 than a 140 in 7mm, I like the BC/SD on the 130 AB in 6.5 and the #s hold up better than 120 if you are shooting any distance.
260/130 vs 708/140 are about same/same in performance on paper, and in field. Very subtle but to me noticeable difference in recoil.
If one likes 120s, again - is a handloader, I like the 120s in 6.5 over a 7mm. Higher BC/SD which I like on longer shots.
