Varget wouldn't get me there with the 140 or really any of the other powders either. I have a 22" barrel on two 7mm08s. Got about 2800 fps with varget. 3000fps with 120s
Staball 6.5 gets the highest velocity for me in a 23" barrel, followed by Big Game, then RL17. I'm running the 145 gr LRX in the mid 2800s with StaBall, backed off from 2900 for accuracy.
Varget in a Tikka with 140 grain bullets around 3000 fps in my wife's 7-08. Not home for about a week so I can't provide specifics but I've posted in other similar threads. Try a search and you should find many load options for the 7-08.
Staball6.5 gets me 3055 from a 26 inch brux. Running lapua brass and a 140 ttsx . The 120 ttsx was running 3260 . It's definitely on the high end of the pressure curve and I'm planning on tweaking it down some now that I'm running a can on the end.