ORIGINAL: Doug S
I can't comment on the powders you want to use but the 30-30 is still my go-to gun for whitetails and I load for it. In an older Marlin, 170gr. Hornadys with IMR4895 are by far the most accurate when pushed to factory speeds. And, they are lethal...Biggest problem with loading the dirty-thirty is that the brass length has to be kept equal for proper and consistant crimping. I know that's always important but very much so on this round if you are looking for small groups.
Doug
with my cases I allow up to a .005 variance in case length and use a lee factory crimp die and seem to get a great results.