I like the 45/70 as well.
I have 4 guns chambered in the 45/70
1. Marlin 1895 Cowboy (JM)
2. Marlin 1895 guide gun (JM)
3. Marlin 1895 SBL (REM) This one is the one I am putting a suppressor on.
4. MR BFR with 10 inch barrel (all so has a 450 marlin cylinder)
I am thinking of adding an encore to the list as well.
my next favorite is the 357 magnum. From a 16.5 inch barrel I have taken many deer.
Shot placement is everything! I would rather take a round of 50BMG to the foot than a 22short to the base of the skull.
all 26 of my guns are 45/70 govt, 357 mag, 22 or 12 ga... I believe in keeping it simple. Wish my wife did as well...