Loco, I too also use my full sink line in the lakes I fish. I'm in the market now for a new full sink for my 4wt. At the show this weekend I saw that Rio now offers a type 6 sink line. I probably will pick one up soon. I rarely use my floating line unless there is a hatch happening and that is what the fish are zeroing in on. I also use my sink tip line alot also.
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Fly fishing, is there any other Kind?