Angus,

Rather than provide a short, Internet condensation of my testing, I would suggest my chapter on the subject in The Big Book of Gun Gack II, "Temperature and Rifle Powder," which contains not only a lot more basic information, but the results from range tests with various powder in cartridges from the .17 Hornady Hornet to the .375 H&H. If you don't have a copy, it can be ordered from www.riflesandrecipes.com--or if you prefer talking to an actual person, phoning 406-521-0273.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck