a puckle is not a gattling gun:
Essentially a very early revolving cannon, the Puckle Gun was designed in 1717.
It features a hand revolved chamber of six to twelve rounds and a single fixed
barrel. You fired the the first chamber, unwound the breechlock, rotated
another chamber up to the breech, wound up the breechlock and fired again.
The weapon fired "One Large or Sixteen Musquete Balles", in other words,
shot or grape. This weapon is either match or flintlock