Taking a look at actual forensic evidence as gathered during the archaeological finds, you'll see:
Forehand & Wadsworth .32 Rimfire
Colt .36
Colt .38
Sharps .40 -.45 and .50
Ethan Allen or Forehand & Wadsworth .42
S&W American .44
Evans Old model .44
Henry .44
200-gr .44
Miscellaneous and Unknown .40
Winchester .44-40
Colt and S&W .45
Springfield .45-55
.45 Unidentified
Spencer
Unidentified .50 rimfire
Springfield .50-70
Maynard
Miscellaneous and Unidentified .50
Starr
Enfield
Round Ball - .44, .45, .50
Shot
No identifiable Webley rounds were found.
The above are attributal to all of the sites investigated.
More on this is found in 'Archaeological Perspectives on the Battle of the Little Big Horn' - by Scott, Fox, Connor and Harmon.
It's the record of the digs conducted across the battlefield after the grass fires of August 1983 stripped off all of the thatch and underbrush of the site - and the follow-on 1984-85 dgging season that completely covered the area.
This is the print version of what you've seen on 'The History Channel', and it goes into great depth, as archaeological work does - yet it's compelling...
Vaya,
Scouts Out!