As Andy said, those four powders are excellent for loading the 45-70.
There's tremendous information in the August 2007 issue of Handloader magazine, in the super comprehensive article by Brian Pearce. He loaded every combination of powder and bullet, seperated out into pressure sections, starting with loads that do not exceed 21,000 CUP, then going up to (not exceed) 28,000, 35,000 and 43,500 CUP.
All of these loads were chronographed in the various barrel lengths of the Model 1895 Marlin.
He states that factory loads usually run 18,000 to 21,000 and he doesn't reccommend loading beyond 21,000 for the trapdoor type rifles.
But wow, this includes some fairly stout loads! I have loaded the Marlin heavier than is comfortable to shoot, meaning a few shots gives me a headache, when shot off the bench, and I haven't been above the 28,000 CUP class.
An example in the "Loads that do not exceed 28,000 CUP," is a charge of H4198 that gives a 405 grain cast RCBS 45-405-FN, a velocity of 1,934 fps!