Originally Posted by juro
Hence the two lines, 4# and 15#. The purpose was to provide a sampling. Any additional lines you'd suggest would be good try.
If lighter lines do not get the loop, then is that because of some reason other than strength?
If you can do it, how about something in the 20# range or higher? It seems from these discussions that many salt anglers use tippets in those strengths.
I don't use the loop knot for lighter lines because I'm using smaller flies at that point (trout, panfish, etc.) and I prefer something that cinches right up to the hook eye for those. I prefer not to use loops with smaller flies because sometimes the loop is almost as big as the fly, and I believe that can make the presentation a bit unnatural. So to answer your question, it doesn't have anything to do with strength.