Originally Posted by kglissmeyer1
I'm with the concensus for the Orvis No-slip Loop Knot. I've also heard it called the Uni Loop or the Duncan Loop. Here's the link with a tutorial:
I also like to use it for small nymphs, especially anything 18 or smaller on light tippets.
I called this the Orvis Knot because I was first shown how to tie it by a guide from the Slate Run Tackle Shop in PA. They are an Orvis dealer and Rich told me it was called the Orvis Knot.
What I have learned over the years is simple. Besides giving the fly a tiny loop for great action I have never had one break before the leader to line connection.
No matter what knot I use (level leader) to connect the leader to my line / butt loop, when I break a rig off it is the whole works that is lost. The knot at the line / leader connection breaks (not the one at the fly) and I lose the entire leader, fly and all.
I don't know of any other in the field test that could be more conclusive when wondering which knot is stronger.