>> Is a double action revolver semi-automatic?
> No.

> A semi-automatic firearm, after each shot, loads the next round into the chamber and cocks the hammer. A double action revolver requires the trigger to be pulled, in order to both load the chamber AND cock the hammer, which is a manual action and not semi-automatic

Oh... I didn't know there was such a thing as a double-action revolver. That explains this...