I like use buzz bombs when jigging for salmon in less than 60 feet of water. If it is deeper than that I think there is too much line in the water to let bb work as well so I will switch to a dart. By the way don't laugh at a guy fishing a bomb in a "pristine" river pool. I have seen them slaughter dollys in the extreme upper Sauk whitewater. Not a method I would expect but it was really effective in that deep fast water.