So Henry, do you currently have any of the faster powders on hand? If so, what do you have to work with? There is a fair amount of data out there so the two powders you listed aren't your only choices. If you ask, some of us can provide you with published data.
Suitable powders include but are not limited to:
BE, RD, GD, Uni, Zip, 231, 7625, AA#5, 700X, TG, N310.
Personally, I have a Ruger Single Six in 32 H&R and have been working with 32 S&W Short and Long, as well as H&R loads. There are a few other members here who work with the Long...they just haven't spoken up yet.