I believe that the 6.5 Creedmoor was designed by Hornady to use TC30 length brass (1.910 nominal length) versus the .308 brass (2.005 nominal trim length) to accommodate the length limitations of AR mags.
The SAAMI recommended 2.810 O.A.L. should fit your mag with some room to spare.
I wouldn't worry about trying to seat the bullets out so deep into the chamber that the O.A.L. exceeds the mag length limit.
I have two Savage 6.5mm Creedmoor bolt rifles and both shoot incredibly accurately with the O.A.L. set within 2.820 so I have found no need to seat the bullets out further than that. They both average well under 0.4 inch 5-round groups at 100 yards for all the groups shot since they were new.
Both rifles have chambers that are short enough to keep the jump reasonable. One of them has over 3,000 rounds down the tube. The most used is my most accurate rifle and shoots better now than it did when it was new, but, I admit that is probably because the 'nut behind the trigger' is a bit more consistent after all that time behind the trigger.