AA2230 should be great for 45-70. Go to the Western Powders site and download the free load guide. There's three load levels for 45-70, Trapdoor, Standard and High Pressure so load accordingly!
"Camping places fix themselves in your mind as if you had spent long periods of your life in them. You will remember a curve of your wagon track in the grass of the plain like the features of a friend." Isak Dinesen
