I have always loved the short actions, but if I was going for brute force and sizzling speed why not do the 257 Wby. Mag? For my deer hunting I would estimate that 50% are inside 100 yards, most others under 250 yards and just the rare 400+ shot.
btw My 260 has a 24 inch barrel. If money was no object I would have myself a CZ 527 carbine built in 6.5 Grendel! That would be one sweet rig!