Hope you don't mind I called you by name. Never had the pleasure of meeting you.
Anyway I was searching the archives for an old post you had put up detailing the specifics of lead core line.
I found the post.
May 8, 2008 - 3:03PM
Re: Leadcore depth
You would need to define the setup in much more detail like what kind of lead core, how long is the leader, what is the diameter of the leader, what is the lure, what is the speed, is there any underwater currents.
With a full core out at 1.5 mph it may be possible to be down about 75 ft. at 2 mph it would more in the neighborhood of 50 ft it all depends on what you have for drag.
This is an article that I wrote a few year back on this subject, it resides on my web site Lead Core Basics
One mistake that people make is thinking that lead core sinks a constant rate of X ft per color, if it did it would not have the bow in the line, the sink rate in ft per color is nonlinear.
However the link to the web page or document "Lead Core Basics" is no longer valid. If you still have it I would truly appreciate reading it again.