While you are waiting on your Lyman check out
http://www.accuratepowder.com/load-data/ a downloadable .pdf with Data for AA and Ramshot powders.
Alliant also has a downloadable .pdf. Note: Alliant only lists MAX charges reduce their data by 10% to start
Hodgdons site has data for Hodgdon, IMR and Winchester.
I believe there are 2 4198s IMR and Hodgdon. I have not used either but the load data is different between the two.
4895 is also made by both IMR and Hodgdon and has loads listed for .45-70. If you check Hodgdons site you will see the data for these two is different as well.
(if that isn't bad enough about 3 companies make a 4350, not for use in .45-70 but just an example)
Since you are waiting for your Lyman, mine lists these powders in .45-70 for lever guns with a 292 gr lead bullet.
SR-4759 (IMR , discontinued I believe)
AA5744 (Accurate Arms)
IMR-4198
AA2015 (Accurate Arms)
N130 (Vihta Vuori) (nice powders from them but usually about 30-50% more expensive than other brands)
H322 Hodgdon
for lower pressure loads (Trapdoor Springfield) with a 292gr lead
they alos list these
RX7 (Reloader 7- Alliant)
IMR-3031
Varget (Hodgdon)
as mentioned Unique would work but you would probably be better served by one of the above powders that Lyman lists or is listed on the powder companies web site.
If ArchAngelCD likes AA5744 I would but it high on my list of things to try first if I was going to load .45-70