Iron Darts, Sometimes Called Garros.
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Iron darts, sometimes called garros, were the earliest ammunition for black powder-powered artillery. They were usually wrapped with leather near the driving end to improve the fit of the projectile in the bore of the gun. This leather gasket helped to reduce the problem of windage, or the leakage of the propellant gases around the projectile. Darts continued to be used until about 1700.