I've just repaced my cortland DT4 floater with a new line (similar budget) and as the old line faired me very well over a number of years, I wandered how similar the two would be in their make up so I measured the tapers on both using a micrometer (bored...yes; cabin feaver...possibly!! I need to get out more)

So here you go..

The taper on the old line was about 70" from the point, and there was a straight tip section of about 6" to the point.

My new line has a taper of about 48" from the point, with a straight tip section about 8" from the point.

The belly of both lines was 1.14mm diameter, the tip of the cortland was 0.9mm and of the new line was 0.94mm, so there's very little taper on both lines as far as diameter is concerned (though I know the effect of weight of the line taper which will effect the cast is the diameter to the cubic power), though there is a bit of a difference between the two.

It'll be interesting to see how the new line fairs in comparison to the old. Leader make up will be needle knotted tapered mono leader, same as the old line.

Anyone have any predictions for cast performance?

(And I promise I'll get more in future...)

When I have measured the weights of many DT lines, first first 30ft AFTM/AFFTA rating and then 30 to 60ft the later level section has been only 1.05 to 1.12 times heavier.

DT is unbelievable efficient when casting directly to the head wind. Better than WF line and shooting head. Actually casting to head wind is very easy because wind straightens the line well on back cast and there is time to do exaggerated drift (pushing rod back and up) so forward cast becomes powerful.

I think DT is efficient to head wind casting because there is possible to cast more line weight out of rod tip and when there is no need to shoot line the line loop stays narrow. When WF is shooted to head wind line loop flattens and widens.