I got the new Precison Trolling book for Christmas. It says that the lures were tested with 10 lb. mono. If I troll with a heavy test Fireline thats equal to the diameter of 10 lb mono, will the results be the same, or do I still need to use the conversion charts?

If the line diameter is the same the results will be the same. It is the water pressure on the line that pushes the line toward the surface.

I use 10lb. fireline for trolling. I add 30% to the feet in depth shown in the book. Thats the advantage of a braided line. I would urge you to try the same pound test unless you have some other reason to go heavier.

if you use a superline that is close to the 10lb test you will be close to the trolling bible info. that is if your line counters are accurate. to really know how accurate they are (all with the same amount of line on each of your spools) try walking down your driveway/dock/whatever that you know the approx. distance and see what your counter measures (try aleast 100ft or more). i just try to keep the reels/line the same and know that if one measures 150 the others should be very close, with everything else being the same.
hope that helps

Hi,
Are you saying that if you put out enough line for a lure to run 7 feet deep on mono, that it is running 9.1 feet on the fireline? Using 10 # mono and 10# fireline. I am under the impression that this is whats happening. Can someone also help me understand the effect of current on a lure. Does a floating lure rise to the top of the river or dive deeper due to the current? Say you have 100 feet of line out in a swift current. Thanks to all who answer. JJ

To put it very simply -
A lure will run at a given design depth - for an average diameter line - say 10 lb xt mono.

Now, if the line is thinner, the lure will run deeper, because there is less upward force on the line.

Conversely, if you troll with thicker line, the lure will run shallower.

In general, you can easily figure a fudge factor for your particular line.

If your trolling bible - is based on 10 lb mono - go out to a favorite trolling run, that runs 15 feet deep. Put out enough 10 lb line, (same as in the trolling book) to just have the lure tick bottom. Verify, that the amount of line out, and speed, correspond to the book.

Then switch lines, and use your line of choice - lighter heavier, thinner or thicker. Note the length of line out for the same tick on the bottom.

The difference will be your fudge factor. It might be more, less or equal to 0.

From that point on, you should be able to use this for your trolling needs.

It would be a good idea to repeat the experiement at least once for a shallow lure - say 7 feet, and once for a deep diver - say 25 feet.

You might have a slightly different fudge factor for deep divers as compared to shallow runners.

Take care
REW

opps! i ment......010 to .015 dia(average 10# test dia)....not test