Chasing the Pig

[SkunkedAgain]

So a question I have with set backs is how much does your lures drop from the ball to say a 50' set back? I'm sure that depends on the lure, so probably no correct answer, but just looking for a ballpark idea? For instance if you use a dodger and squid will it drop similar behind the ball as it does on the same line out the back of the boat... at the surface? If that's the case I imagine they drop maybe 3-5' per 50' back depending on boat speed... So if the fish are between 30-40 foot deep we should run the ball at 30' and lure will drop into the center of the zone... does that sound correct??? Thanks J