I have just been having a closer look at this sight and it gives some interesting data
I used to use fireline, but it is a bit bulky and I heard that it tests very high, so I changed to a thinner braid (whiplash pro)
From this site it looks like 30lb braid is about a third of the diameter of fire line and line tests show it breaking just over the stated line strength not about 50% over like the fireline.
Glad that I changed, just need to be confident that I am using the best mono to braid knot.
I believe that the one I use is the double grinner knot, but it could be a double uni knot.
The grinner/grinner gets a good test result and I believe the uni/uni less so.
I changed from a knotless knot a couple of years ago after it failed a couple of times, I started to suspect that I was not tying it well enough, when I needed to replace a leader while fishing.
Confidence in tge knot had gone, so I changed.
What knots do others use?
And who knows the differance between a grinner/grinner and a uni/uni
Charlie
PS
Rob I seem to remember that you ran some tests on knot strengths, what did they show regarding the various mono and braid joining knots??