I recently purchased an old 1947 book by an American named Truesdale (sp) on the "Development of the Sporting Rifle." I read it over the weekend. The author related hundreds of quotes from experienced and famous hunters around the world and their experiences with different rifle calibers and their effectiveness on large and small game. It is fascinating reading because it is before the modern "magnum" calibers. I was intrigued with the universal popularity and effectiveness of the .256 Mannlicher in the early part of the 20th Century, for instance. What surprised me was that the 9.3X62 or 9.3X64 were never mentioned in the book although there were rave reviews of the .35 Whelen which is nearly identical. There were a few passing references by hunters such as Karmon Kittenberger, for instance, regarding the 8X68, 9mm, or even much mention of the 7.9X57 (8mm Mauser)... yet we know (or I thought) that these calibers were quite popular in Africa. Who were the famous European (continental) Ivory and Big Game hunters of the early 20th Century and what European calibers did they use. Is there an old book that discusses this?