Varget is great, and is what I have been using. The only thing is that I don't get best accuracy until it is like 120% filling the case (seriously compressed). For 55 gr bullets I use 26.3 gr of Varget. Groups tighten up noticeably beyond 25.5 gr.
I would like to find a powder as accurate as Varget but does not require as much compression and gives accuracy over broader range of loadings. So I am planning to try BL-C2, TAC, and H4895 since I load for 55 gr - 75 gr bullets.
I may find that to be a pipe dream and stay with the accuracy of Varget, but I want to at least try a few others before closing the door.