there are now a lot of lines made with a solid core. Nail knots do not hold
very well ont these because the core will not crush, and the nail knot can
cut and strip off the coating. For salt water fishig, most people I know
have gone to braided loops held on by two nail knots tied close together at
the upper end of the braided loop, then cover the knots with aquaseal or
equivalent. . As someone else mentioned, the chinese finger puzzle benefit
of a braided loop only works if it can stretch, so only the portion below
the last knot works .
I also use braided loops for light trout fishing but I apply Crazy glue or
some other CA glue before sliding on the plastic sleeve or shrink wrap.