thorarinna,
You have a good question that makes one think, but, I cannot offer any answer because I am assuming you are referring to a tapered mono leader and I do not use them. I make and use a Furled leader out of Berkley Vanish Transition fluorocarbon. To it I attach my tippet and my tippet could be anywhere from 4 pound test tippet to 8 pound test tippet depending on what fish species I am fishing for or what fly I am using. On my Furled leaders, the weakest point would be the tippet end loop and I have tested it and it broke at 12 pound test. With that thought in mind, I use the same Furled leader make-up on my 3wt, 4wt, 5wt and 6 wt. So, my weakest point in my set-up would be the tippet and not the leader.
Sorry I could not be of more help.....
Last edited by WarrenP; 12-02-2010 at 11:27 PM.
Warren
Fly fishing and fly tying are two things that I do, and when I am doing them, they are the only 2 things I think about. They clear my mind.