If I Put A 1/16 Oz Jig Down Say 8 To 10' And It Starts Heading Down Stream And I Am Close To The Main Channel I Know I Am In Trouble.... Usually Go To The Back Of Coves And Have A Little Better Luck......... Mostly Just Depends On How Much They Are Letting Out, And Then Sometimes It Doesn't Seem To Matter, Like U Said Hard To Figure Out........