Not MD:

Some that are close are VV560, VV165, Retumbo, Magnum, IMR7966 and the slower 8133. MRP is a little faster and MRP2 which I forgot the new name is a little slower, these correspond to R22 & R25. H1000, 7828 are in that general burning rate too. No experience with them but 4955 & 4451 as well as Hybrid 100V are all contenders. Reloader 23 is good and power pro 4000 also does well. The Speer data shows 7828 ahead of R26 by a gnats hair but 7828 may be easier to get good accuracy from than R26.

I have been trying the newer powders but have shot most of the game with 150s and H4831 even if it was only running 2,850 to 2,900 fps. If it was good enough for Jack it is good enough for me.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli