This was, as many have mentioned here, the first pairing of director Anthony Mann and actor James Stewart in what would become their `psychological Western' sequence. This first collaboration is a fine film, but better was to come.
Stewart had built up an on screen persona of affability, likeableness and general do gooding. It must have been a bit of a surprise to the film goers of the time to see him here, playing much the same character but with the added dimension of being hell bent on a mission of vengeance. Lin McAdam is a generally nice guy, but he has a mission to complete, he must find and kill the man who shot his father. He is almost blind to all else. It's a step away from Stewart's usual character, and even bigger steps into the dark side of the human soul would follow in later films.
As well as the story of McAdam's mission of vengeance this film also follows a gun, the Wnchester 73 of the title. One in a thousand, this is a special gun and everyone covets it. By rights it belongs to McAdam after he won it in a shooting contest, but it gets stolen and passes through many hands until it is used against him in the final shootout. This allows the director to give us a series of vignettes built around the people that have the gun, giving us some fascinating characterisations.
There is a generally fine supporting cast to lift this another notch (the weak link is Rock Hudson's Apache warrior). Millard Mitchell puts in another great turn as the solid and dependable companion of McAdam (why he never became a leading man I'll never know, he provided many memorable supporting performances), Dan Duryea is a charming unhinged wildman and Shelley Winters is perfect as the lady of the piece. The scene where she explains she knows what the last bullet is for is very memorable.
A great study of human nature, a thrilling story as the heroes deal with various Indian attacks and gunslingers, topped with an unexpected twist right at the end and one of the bust shoot-outs ever filmed, this is an out and out classic. But because better films followed it I am only going to give 4 stars.