Use this link to get a good burn rate chart. http://www.steyrscout.org/burnrate.htm
I don't agree with their placement of Big Boy/Magnum but this could be due to particular batches or lots. I have Big Boy as being faster than V V N-170 and slower than Re-25. Maybe my lot of Re-25 is faster than their test lot, I would guess.
I use the Big Boy in .300 WBY, .270 WBY, .264 Win. Mag. with heavier bullets and in the .300 RUM with lighter bullets.
Anyway, enjoy the list. It's also part of a very informative site.