re: Is Dances With Wolves Buffalo hunt the grandest spectacle in a western?

Not sure of the caliber of that Winchester rifle, but no way that rifle shot is taking down an adult buff who is charging. A well placed shot through the heart would eventually kill him, but it would take a while for the buff to fall.
That Indian kid would have been a stain on the prairie. The skull of that buff was bigger than the kid...instant splatter!