To the best of my knowledge, Remington has never used a single letter headstamp, so I sincerely doubt that the brass was made by that company.
The .308 Winchester hit commercial markets in 1952.
Unfortunately, I don't believe such a book exists, nor do I really believe one is possible. Some companies have used certain headstamps literally for decades.
Some, of course, have had shorter lives, such as CAPH (Colt Auto Pistol Hammerless) which was only used commercially for perhaps 20 years, but for the most part I think the best you'd be able to do would be break most cartridges down by era, not even by decade.
JonnyC is heavy into the cartridge collecting fraternity, so he may have some thoughts.
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