Erik,
Watched a recent program on History Channel, seems like towards the end at what the whites call "last stand hill" the Native accounts were that dust and dirt were so thick that about all they could see was shadowy forms, and a few muzzel flashes. The Native accounts say they surrounded the hill-top on foot, from about 100 yards, and lobbed arrows in (like mortar fire) till the shootin stopped and then went in and finished the killin. It was more effective against the troops that were prone behind dead horses, than rifle fire. That may be why he got so many, like hail comin straight down and nowheres to go.
rich