H4895 is borderline too slow for full-up loads in the 45-70, although you can reduce it, you are screwing up. H4198 is the sweet spot burn rate - I run 405gr jsp @1800fps Guide Gun. When I have loaded subsonic, I used fast pistol powders, no fillers, CAS data as provided in the link earlier.
Here's the link again
http://www.gmdr.com/lever/lowveldata.htm
