i spent a while today tying knots with the fluorocarbon line that i picked up the other day. i use a bigger gauge wire hook and the line performed great. i tie two big hooks together and pull until they broke. the polomar knot seemed to perform the best from my tests, although i didnt really use too many 'shock' type tests.

i came to the conclusion, as someone had previously said, that i was tying the fluorocarbon onto a very tiny gauge wire on a barrel swivel. that tiny diameter wire made it hard for the line to do what it does.