Trivia: There is no dialogue in the first 10 minutes of the film.
Trivia: When the camera crew were rigging the bridge to be blown up, the supervisor in charge of the detonation who didn't speak any foreign language thought he had been given the instruction to blow up the bridge and proceded to do it. Trouble was, the camera crew hadn't finished setting everything up and it was not filmed at all. Sergio Leone was (according to Clint Eastwood) the angriest anyone had ever seen him. As a result, the army agreed to rebuild the bridge for free and it hired a detonator who did speak the right language. This time they got the shot.
Trivia: Eli Wallach actually did get a black eye during his torture scene (but thankfully nothing more).
Answer: There's a show called "Hollywood Weapons: Fact or Fiction" which dealt with this exact question (s01e03). Blondie is roughly 200 yds away. In the show the host didn't hit the rope, but only missed by an inch on his first attempt. I definitely think an expert Sharps Rifle shooter could make the shot. The issue however, is the bullet would most likely not actually slice the rope apart as seen in the film (they fired the Sharps at point blank and the rope remained partially intact still). They also tested shooting a hat off someone and (as expected) the bullet just goes right through the hat without lifting the hat at all.
Bishop73
That was another thing that puzzled me. On several occasions in this film, Tuco is suspended from a rope, and Blondie cuts the rope by firing a bullet at it, (I think Clint Eastwood repeated the trick in "The Outlaw Josey Wales"). But if you fired a bullet at a rope holding a (rather large) person like Tuco (or a similarly heavy weight), even at close range, would it really sever the rope? I will have to look out for "Hollywood Weapons Fact Or Fiction." I hope they only used a dummy or a model to re-create the shooting feats. I don't think I would have liked to have been hanging on a rope while somebody fired bullets at me to see if this would sever the rope, or to stand there while they fired bullets into my hat to see if they could lift it off my head.
Rob Halliday