I think that was in 1906 in Brownsville TX. I remember reading the report at some point that 30-03 cases were found. Of course, the rifles could have been modified to 1905 standards, too.

The court martial of the black soldiers was unduly harsh, several hundred being convicted or at least dismissed from the Army, including many that had nothing to do with the incident. It was a black mark on T.R.'s record as president, that he upheld the conviction. IIRC, most of the soldiers were pardoned ... some 80 years after the event, when nearly all had passed away.