rather the understatement of the year…
a Bomb, Controller, Sacrificial, Depth-Charge or whatever you want to call it is a fly used to bring down lighter, more ‘natural swimming’ flies on droppers down to the bottom in deep pools and/or fast currents. one could consider it a sinker with a hook and that last point means that:
a) it could easily snag on a rock or something and b) it can also easily catch a bottom-hugging fish.
sure, a) sucks but b) makes it worth it, specially because some times there’s no other way to get our flies to the fish.
pretty much geared toward the ‘Euro-Nymphing’ approach where flies are lobbed back upstream after the drift, this bottom-dredging caddis imitation by David Downie is sure to do the trick and pick up a few on it’s own. because of it’s weight be sure to pay special attention and greatly open up your loops and better yet use an elliptic cast if you’re going to cast it in a conventional way. (or be prepared to wear it somewhere on your head or body… )