I use Varget now days.. I chit canned RL15 it was running slow. I use 24.5gr varget with 80.5gr Berger’s. I use varget with my TMK as well. Tomorrow I finally leave for home. So I will be able to see what I have for notes with TMK.
Varget is a great accuracy powder, one of the very best, but you can't get enough in the case to get much over 2600 FPS with 77's.
If that is enough for you, Varget is hard to beat; the only other issue with it is that it fairly large grained & doesn't flow through a powder measure nearly as well as several other comparable powders for high volume loading.
But f I was picking a pure accuracy load, especially for 100-300 yard work, at anything between 2500 & 2600 FPS with 77's, it would be hard not to go with Varget.
