if its alot of current chances are the 2oz sinker isnt holding and wont hold until its in a snag. go with a sinker heavy enough to hold when it hits bottom and id also suggest using somthing like a flat bank sinker or a no roll so the current cant roll the sinker along bottom,you can also tie your sinker to your swivel using a smaller test line than your main line,when it hangs youll loose your sinker and not your whole rig.
also since your going after flatheads id suggest using that shad live instead of cut,cut can and will catch flatheads but most will tell you live is preferd,in that current id hook the shad in the lips or nostrils so you dont drown the bait. hope that helped ya a little.
[smilie=a_bravo.gif] Great advice madkat about the weighting situation. Heres something that can help in hooking big shad and herring as wellhook them through the eyes above the eye not through the eyeball itself. They stay alive just as long and are much more resiliant to comeing off in current and when a fish makes a good run