I thought I'd come and share these little snippets from Yellowstone Kellys book, I know some stuff gets changed and whatnot but I believe that he used his rifles chambered in .44 Henry to a great extent. Now would I be man enough too do what he did? probably not but never know.
"There were buffaloes feeding within half a mile and I took my rifle and started afoot to get some meat. I approached to within seventy-five yards of a bunch of cows that stood unafraid gazing at me. There was some choice of meat here, for there were many two- or three- year-old heifers and young bulls. Though it seemed doubtful that they would stay for nearer approach I walked along for ten or fifteen yards, for I was mindful that I carried a .44 Henry and the little flat-nosed bullet did not always stop a bull at seventy-five yards. Selecting a two-year-old heifer I let drive and she did not go many yards before falling inert on the ground."
"Meanwhile, the buffaloes were pressing along so close that we were in danger of being run over. At this juncture my partner threw a stick of wood, which hit an old bull on the back. The animal paid no attention to this, and thinking his hide would make a cover for us on a cold night I rose up and plugged him in the center of the mass of hair that hung over his eyes. I had been told that a .44 caliber Henry bullet would not penetrate the bone through this mass of hair and sand, but he dropped and there was great tumult as the herd parted right and left, slipping, sliding, and falling over each other in their excitement. Skinning him was no fun, but at night the heavy green hide stretched over the canvas that covered our bed kept us snug and warm."
Like I said, don't think I'd be man enough. Probably get the whole herd chasing me down till i was jelly on the ground.