This is said to be Enzo Castellari's debut film and it's for that reason I tracked it down. Sadly, it doesn't quite become a great film, but does have it's saving graces.
There's a town in Montana where ranchers and farmers are having a land dispute which about to become all out war, and while on his way there bounty hunter Regan (Antony Steffen) happens across the murdered body of the town's sheriff. Adopting his persona, Steffen breezes into a town that has got a whole heap of warring factions going on...and he's caught right in the middle.
On one side are the farmers, reluctantly led by Frank Wolff, who believes he can settle the business peacefully. Frank's problems are plentiful - his daughter is getting harrassed in town by ranchers, his land is being threatened by ranchers, the farmers want to go to war and there's the slight problem that Frank may well be a hunted criminal with a bounty on his head who is impersonating his own twin brother. That's what Steffen thinks is going on, but then he's impersonating a sheriff so it's a case of pot calling the kettle black.
The head of the ranchers just wants to wipe the farmers off the face of the Earth and get on with, so he brings in some outlaws who reckon that the fake Frank might be the real Frank too, and after a lot of talky bits, we do get an all out gun battle at the end, but is it too little too late?
Possibly. The film is almost devoid of Enzo's patented crazy camera angles, so the dramatic scenes (where Steffen falls in love with Frank's daughter, and there's a lot of talk about taking land, people threatening each other, that sort of thing) drag on a bit, but then there's a good chemistry between Steffen and Wolff, because you're not quite sure if Frank is impersonating his own brother, or if he is, whether or not he's a reformed character or still a violent outlaw.
Things do kick into gear when the action arrives. Maybe it just took a film or two to realise where his strengths lay.
Enzo himself turns up as a gunman who gets a cap popped in his ass. I wouldn't put this anywhere near the top of a 'must-see' list.