When Obi-Wan Kenobi said to luke "these blast points, too accurate for Sandpeople. Only Imperial stormtroopers are so precise." he was being sarcastic. amirite?

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He was not, actually. Someone did an on-scene calculation, and indicated that Stormtrooper hit 1 shot per every 80 shots on average.

Sound like they missed a lot, but consider that we have never really went above 1 : 200, Stormtrooper has a rather impressive accuracy.