There was a big discussion on this some time back. Try this:

http://www.hatofmichigan.org/uploads..._Casting_2.pdf

I have since talked to Bruce Richards about this subject. My rash judgement in this regarding front tapers was with regard to floating lines. Bruce clued me into the fact that there are numerous specialty tapers now on the market which can help a great deal in specific situations. But in general, most tapers for dry fly lines are rvery similar for their normal flylines. Talk to Bruce - he is the expert.

Bob