I think Lee and Lyman may have the biggest selection as to newer powder(s), the problem, of course, is the online stuff, the paper manuals aren't selling like they need to, to justify the printing of new paper manuals as new powders show up with of course new cartridges, but.. the older and newer paper manuals are still very useful, especially the older ones that worked with higher pressure(s). The problem I see is most manuals were bought based on the bullet selection not for the powder, it was more about advertisements for their bullets by the manufacturer, granted some powder companies did the same thing only it was powder instead of bullets, so my thoughts are; you have to go with what you've got or what feels good I guess.
Cheers
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