yep, everyone is different, but 22 to 24 was the norm., and an occasional 18" was used successfully. True though, boat speed/line angle do matter for sure. I'm just sticking with short cuz I am a stubborn dude, and it was working. Also, Sky-dude is running heavier leader, quicker action, I use 40#. That's my norm, though, 40# UG and 22 to 24 inches of length, color not too important.
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Have pole, will fish.