There’s only one gun mistake in it. The film is set in 1880, but makes a reference to “.30-30 shells,” which was pretty prescient because the .30-30 would not be invented for another 12 years. But otherwise, Clint Eastwood and company got it all right. The “hero” killed men, women, and children, has a broken-down horse that hates him, and is a lousy shot with a rifle. The “villain” is a sadist, a monster, and an authentically brave man. A cowboy gets killed in an outhouse. The Schofield Kid, gunfighter in training, kills, and is sickened by it.