A Sharpshooter on a blindfold

A sharpshooter hung up his hat and put on a blindfold.
He then walked 100 yards, turned around, and shot a bullet through his hat.
The blindfold was a perfectly good one, completely blocking the man's vision.
How did he manage this?

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The sharp shooter hung up his hat on the barrel of his gun.
So while walking the 100m the hat was with him, covering the barrel.
He could not miss.