Originally Posted by
darkker
So there is quite a lot to that question, but here are the highlights for you.
"Burning rates" aren't a fixed thing, they change based upon the cartridge used in. Burning rate charts are a relative thing based upon caloric bomb testing.
Because burning rates shift, it isn't just the total case capacity that is important. For a very very generalized idea, think of it based upon amount of powder loaded for the bore and bearing surface of the bullet used.
The Creedmoor then looks stunningly similar to the 30-06, which is why the same powders are the appropriate choices.