45-70. 480gr cast over imr 3031. I wanted to use black powder but I was worried about cleaning under extended field conditions. The 3031 load is also a lot faster.
I learned a lot hunting with it. I got a slip on type no swivel sling from Shiloh. It works but almost interferes with seeing the front sight.
Its hard to carry the rifle and sticks and still be able to glass and rangefind.
At 276 yards, my front sight is really big compared to a deer.