The modern 45-70, loaded to the gills in a strong rifle can almost kind of sort of match what the original defective 458 Winchester rounds did. The rounds that gave it a reputation for being dangerously underpowered, and is still talked about 50 years or more after they fixed it. Somehow, that makes the 45-70 appropriate for Buffalo hunting in some circles. Doesn't add up for me.
I know it killed millions of bison, but they aren't the same beast. And I know it will kill a Cape buffalo. So will my 30-06, or my son's 243 for that matter. Doesn't make any of them appropriate rounds for cape buffalo. Appropriate isn't about killing it on a perfect broadside presentation. It's about stopping it from a suboptimal angle when the chips are down.
The buffalo in the second video dropped quickly because the second shot disrupted the nervous system in some way. I couldn't tell what the hit was exactly, but animals don't drop like that from blood loss. When they bleed out, they slow down and stagger and fall. Maybe he put it in the animal's ear or hit the high shoulder or spine, I couldn't tell. It wasn't the amazing power of the 45-70, that much I know.
it's a great round and it is capable of things the original designers couldn't dream of. And yes, it will kill a buffalo and no doubt an elephant with the right bullet and bullet placement. But it is close to a stunt, which is entirely fine by me if done by someone who understands exactly what they are working with and has enough knowledge and respect for the animal to do it cleanly. To me, it is no different from using a handgun or a bow- if you have the expertise and the patience, it can be done, and the extra challenge has appeal But these are things for the experienced hunter. A 45-70 just isn't an appropriate tool for the vast majority of buffalo hunters, no matter how good a job it does on the two animals that died cleanly enough to be used in the promotional video.