The bison were not exterminated by bullets.
Again your numbers are wrong. The short grass herds were already greatly diminished. There were not 30 million buffalo by the time market hunting started.
Well now you argue against yourself. What diminished the herds prior to market hunting? How did white hunters, few in number kill all the bison? Why were dead bison reported laying dead scattered around like pumpkins on the plains? Try Google. You give white hunters too much credit. All they did was deliver the coup de grace.
