I’ve always had great results with IMR4198, I use it in 4 of my 5 45-70’s. Reloader7 and accurate2015 have been good as well, just not quite as good as IMR4198 (for me). Like sawman said, the 45-70 is very versatile and there are tons of loads for it. With the powders you’ve got, you should be able to achieve your goal easily.


JTD