As far as graphite goes, you won't have to worry about "slow" action, as there really aren't any slow-action graphite rods, because of the characteristics of the material itself.
"Fast" rods put a lot of energy into the line and create small, tight loops when casting. They are good for line control while nymphing, and can turn over a roll-cast easily.
Moderate rods split the difference between "fast" and "slow", providing the ability to create fast line speeds, but also to slow down the cast for more sensitive presentations.
Bamboo and Fiberglass are typically associated with "slow" action. But do not fall into the common mis-interpretation of "slow" as "worse", or "old-fashioned". There are plenty of reasons and places to use a slower action rod (and surprisingly, you can buy bamboo and fiberglass rods that are nearly fast-actioned). I use fiberglass a lot and I really like the fish-fighting characteristics, as with a more flexible tip the fish is much less likely to break you off, the tip acting like a shock absorber. (they are great for steelheading...shhh). The bad thing about fiberglass rods is that you really can't find modern ones. I build them myself from blanks from a few makers, and like to use single foot guides with light finish. These are some seriously fine rods for high-Sierra trout streams, and you would be surprised at how light and sensitive they are. With a fiberglass rod it is possible to land the fly on the water with virtually no impact, a great asset when fishing slow water for spooky fish.
Buzz
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