If you're not interested in the longer/heavier VLD 6.5mm bullets, the 260 will fit in a 700 SA factory specs magazines just as well as the 6.5 Creedmoor and, as noted previously, you get a little more case capacity with the 260.
I like the 6.5 Creedmoor and think that it has 2 advantages over the 260; great factory ammo and the shorter case allows for a better fit in 700 SA factory specs magazines with the longer/heavier bullets over 130 grains.
The 129 grain Hornady and 130 grain AB have worked well for me in a variety on 6.5mm bore rifles.
