Some people like using long actions for short action calibers because they have no restrictions other than the barrel throat on how long they can load a cartridge using a VLD bullet. In the case of the 6.5 Creedmoor, the case was shortened compared to the .260 Rem specifically so that VLDs could be loaded with the minimum amount of bullet in the case required to retain the bullet while remaining within 2.85" or there abouts. Essentially it was made to load the bullets out long and still fit in the magazine of an AR-10 pattern rifle. The 2.95"+ magazine length available in a Savage short action will acommodate most anything you can put together in a Creedmoor.