If you're going to use it as a repeater, the 6.5 Creedmoor was designed to facilitate the use of longer/heavier bullets without running into any COAL issue with the magazine.

While I don't shoot at 1,000 yards, I have a Savage 11 in 260 with a heavy 26" Shilen barrel that regularly shoots MOA or better at 600 yards. If that bullet is seated to the bottom of the case neck, the resulting cartridge is too long to feed from the magazine. I think that using the 6.5 Creedmoor would eliminate that problem, but I haven't played with the 6.5 Creedmoor, so I can say from experience.

Jeff