Which one is right/sounds better: "The shot men drop to the floor." or "The shot men drop on the floor." I am trying to imply they are either dead or heavily injured. I am not a native speaker, but enjoy writing. Thank you!
Since they are already on the floor (unless they are flying when you shoot them) it is better to say "drop to the floor". However, this does sound more like "they duck down to hide" so a better verb like "collapse" or even (figuratively) "crumble" might be better:
The shot man crumbled to the floor and remained motionless, except for a growing puddle of blood.