Those powders are largely gone, replaced by Vulcan take downs such as 872. Hodgdon sells their 869 which IME, has about the same burn rate as 872, at least the lots I have.
I just got some Vv N570, reportedly a good one for those big cases. Dealing with these mega rounds is a different experience than conventional reloading using conventional powders.
These big rounds are getting pretty far into the Loony woods...
DF
