Here's a link to a 2004 edition of Alliant's Reloader's Guide
, there are laods in here that aren't on the current website. I found it on another forum looking for data for Herco powder.
Alliant 2004 Reloader's Guide
Also, some stuff from Alexander Arms on their calibers:
50 Beowulf Data
6.5 Grendel Data
What about stuff like Taffin Tests? I'm not sure it's been tested by component companies, just old Taffin
I'll include it, if it's not official enough then I expect you'll edit it.