Attached is a nice group using John's max of 60.5 of Varget with the 250 NAB. I shot this group just this morning. But I got 90 FPS less than John did with his. He has written that Varget varies quite a bit lot-to-lot and he has seen up to 2 grains different required to get the same velocity/pressure from one lot of Varget to the other.
I'm also attaching the chart of his original 9.3x62 data.
Cheers,
Rex
EDIT: I was wrong - it was Re15 that John saw the lot to lot differences with, not Varget. He wrote that Varget was quite consistent. Sorry for that error.