Guess the surprise was on him - or rather his troops.
I remember reading that somewhere. I also remember reading that European generals, particuarly the Brits, felt it would be a waste of ammunition.
Custer’s men had single shot trapdoor springfields - a fine weapon. But they were undone in part by copper cartriges which jammed in the heated guns, and some repeaters in the hands of the Souix.
***But they were undone in part by copper cartriges which jammed in the heated guns,*****
The Brits has the same problem at a little place called Isandlwana. Same ending as at Little Big Horn.