Not yet- you've basically brought a cake, but I'm waiting to see if it has a pretty girl in it. Then I'll be surprised. I emailed the host of the site requesting information on his source.
Again, for people who wish to cling to this notion, I want to see a source directly connected to the development of the 7.62mm NATO cartridge, either official Army documentation or a statement confirmed to be from a member of the design team. Everything you folks have waved about is hearsay, you've provided no evidence to support your claim.
The reason why I ask for official documents is the Army documents that I have copies of in my collection don't say word one about the .300 Savage. I've always found the development of powders and propellants interesting and the evolution of .30-03 to .30-06 (military version) to the T65 to the final NATO specification and the .308 Winchester and various offshoots is actually rather interesting. If you have access to a valid, documentable source, I'd love to see it. But so far... All you've given me is along the lines of proto-encyclopedias from 16th, 17th and 18th centuries that insisted that unicorns and dragons were real becuase they were mentioned in the bible- that's not evidence, thats folklore that's been repeated.