Its a stunt, and sure it can be done..I would use a hard cast bullet or a GS Custom flat nose solid and push it as fast as I could...

I know of a couple of Buff killed with the 45-70 and it killed them, but they sure did make a lot of tracks in both cases and took a lot of shots...

Also read an article by a Idaho gunscribe who proved it could be done, he shot his 5 times over about a mile and was satisfied the 45-70 was a Buff rifle...

Apparantly these fidos have never looked a charging Buff in the eye, I have and the eyes are big as tennis balls and red and you can see the hate..I'll stick with my 404, 416 Rem or .470 but I could care less what anyone else shoots a Buff with, after all you have the PH to pull your poop out of the fire when all goes bad.