Actually it was his claim that one of the reasons the Creedmoor was developed was to avoid powder encroachment. I don't know enough about the history of the cartridge to have an opinion on it one way or the other; but yeah, he also mentioned magazine length, ogive length, etc. I believe he's going to follow-up with a similar article about the 6.5x55.

"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown