There are literally hundreds and hundreds of loads for the 45-70. Just about every powder known to man can be used in the 45-70. Lots of bullet weights and styles too. There are entire books dedicated to 45-70 loads. Start googling and looking at web sites and search forums, there are links in this forum to great light load data. You could look at some load books too. I could easily fill a hundred pages to answer your question.