downwindtracker2 mentioned Stan Watson. Mr. Watson wrote a data manual/book on the 30:06: A HANDLOADER'S ODYSSEY THE 30-06 DATA MANUAL. A excellent, very through look at the 30-06 for the handloader. Of the many things I learned from reading and re-reading the book, none are more important than the statement he makes regarding pressure signs. Absent pressure testing equipment the practice of looking at the brass case is flawed. He utilized the Oehler equipment and says that brass in general shows NO pressure signs until the pressure is very excessive.
The last time I heard from Mr. Watson he was doing a similar project with the 280. I know he had some health issues, but I have not seen his signature (OKShooter) recently.
