I'm actually very conservative. My instructor in a high school reloading class,fun school) told me that I should never assume anything in the shooting industry, because no two barrels are the same.
I used word of mouth but carefully worked up.
When Quickload came out I was definitely an early adopter. I've found that it is the ONLY reliable source of load data because it can be calibrated to the specific barrel. Occasionally, I bounce new loads off those posted at Reloadersnest.com, for confirmation and work up.
I have used many bullet brands with different cartridges, and have not seen where Berger bullets or any other, at a given weight, require special loads.
For example a 140gr 26cal bullet, whether it's a Berger, Nosler, Sierra, Speer, Remington, JLK, Lapua, etc, will have the same load range to work up through. Going from this to a heavier bullet, or jamming into lands, will of course require adjustment.
If someone feels they need to see load data from a specific bullet maker to proceed with basic reloading, they are pittifuly lost,especially someone possessing Quickload).
What load data will Berger be copying for a manual?
What will Berger gain from predicting loads within such a manual,aside from liability and limelight)?