There are often times, especially earlier in spring, when taking panfish, means getting down into the 5' + depths is you want to catch fish. This requires weighted flies and or sinktips. My "panfish" rod is an old Orvis Far-and-Fine 7'9" 5wt. This rod feels like most of todays broomsticky 3wts, fishes like a 4wt, and has the guts to throw sz 10 tung BH buggers 70' threw modest breezes with a WF6F line. It flexes quite nicely with a 7" bluegill on, yet has the power to quickly wear down incidental fish such as smallmouth, largemouth, channel cat, carp and drum. Why fish a 3wt rod with a 3wt line and make a chore of casting weighted flies and even small pan-poppers? Maybe cause most of todays rods are so stiff? Or is it more of sometihing to brag on fishing an "ultra-lite"? Fiberglass rods in 5wts will flex deeply with panfish on yet allow the angler to fish with 5 and 6wt lines effectively. Personnally I like and will recommend the versatality of a 4 or 5, or dare I even suggest, 6wt fly rods if they are of the Softer variety with moderate to slow action.
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US Veteran and concerned citizen