Well we can all second guess, even the people who were there, are you aware how inaccurate eyewitness accounts can be? Very inaccurate. As for the range and power of the Springfields they were still heavily outnumbered and the Indians were defending their women and children, that's always a huge motivating factor. Reno was in an untenable position as he saw it, doesn't make him a coward or incompetent, means he assessed the situation the best he could and made a decision just like all military commanders are trained to do.
As for who and more importantly why a movement was made to make contact with Custer is actually a moot point because if a way was open we have no idea if Reno would have taken it or not.
in a sense, that's what makes it so interesting...I like to shy away from the "Custer wanted all the glory" kinda thing as much as I woudln't condem Reno perse as a coward...
Reno was no Indian fighter, but certainly a very brave civil war officer, yet in a sense it makes him incompetent
Custer was certainly in a tight spot politically, needing to get a good outcome of the campaign...he was only re-instated by Grant because Sheridan demanded it...so a glorious campaign would have secured his stay in the army
EVERY officer in a comand position was either in allegiance with custer or hated his guts...very interesting way of going into battle
"they were still heavily outnumbered" look at the numbers of Reno's and Benteen combined command: they're not that high, are they? specially with Reno loosing half of his men....yet, they held out for a whole day and a night with the Indians giving up finally...if the numbers factor would have been that heavily counting, they should have been wiped out just like Custer