Berger apparently has come out with a reloading manual, but they have long promoted making bullets at a length specific to your own rifle. I have had excellent success with Berger bullets by looking up the charge in another manual and using the listed powder charges from there.
You can look up the data from the manufacturer of the powder you are using.
The way I do it is find the caliber and bullet weight in my Hornady reloading manual. I then find the listed powder charges. Starting at the lowest, I make 5 rounds of each charge, going up 1/2gr at a time. So even if a charge isn't listed, but is between two published numbers I load those also. IE: lets say that you are using Varget. 34,9gr says 2200fps, then the next listed charge is 37.1 for a supposed 2300fps. There is 2.2gr there to play with. The next listed number is 39.4; another 2.3gr to play with. Some guys will load up .2 but I am not that fussy.
I have found that I get a good group with a lighter charge, and as I work up to a higher charge, I will again get a really good group.
hope this helps.