No blood...
I guess I'm spoiled by CGI shots making the entire head explode or putting a huge hole in somebody's stomach, but when I watch these old movies and don't see any blood, it's hard for me to get what's happening.
The gang shot Cotton in the back trying to flee - was he hit or did he just fall off the horse on his own?
When Ringo got the gun shot out of his hand, did it destroy his hand? No, he was able to shoot again later.
Somebody gets shot, they crouch over. Was he killed or just injured?
Without the blood, I don't have enough clues to the severity of the shot.
I don't need the gore, but I guess I don't experience with the hints the actors from the 50's give to let the audience how badly they were shot.