The 45/70 Govt.
I have a new Marlin 1895 SBL in 45-70. I reload all my own rounds for all my firearms. Hornady manual says the newer 1895s can handle upwards of 40,000 CUP.
I have Missouri #1 Buffalo 405GR with starline brass and large magnum cci primers. I want to use (already purchased) IMR 4198 for these...