The latest edition of Mark’s much-needed series on fly line selection. Bring your nerd hat and you’ll learn something new, guaranteed. 

Personal casting mechanics and style can also factor heavily into selecting the right line for your two-hander as well. Just as with the actions and grain weights of the different two-handed rods, casting mechanics vary greatly within the world of speycasting, with some casters utilizing short, compact casting strokes while others employ long, “rangy” motions in their stroke.
By the same token, many casters have a little “giddyup” in their cast while others move slow enough to seem as though they’re casting in molasses…All of these styles and mechanics can influence line selection. The physics of fly casting dictate that the energy of the cast is directly proportional to the mass of the line and the square of the speed of the line, so if you are a caster with a fast forward stroke you can often use a lighter line than a caster with a slower stroke speed and still flex the rod into the “sweet spot”. Similarly, if your casting stroke is on the longer side, you can utilize a heavier line than a caster with a shorter stroke length and still load to the sweet spot.

In the next post, I’ll take a look at how choices in terminal tackle may affect line selection…as always, feel free to add your ideas in the comments section.

Echo/Airflo Pro Ambassador Mark Hieronymus is a senior guide for Bear Creek Outfitters, pattern designer for Umpqua Feather Merchants, and serves as the Trout Unlimited Southeast Alaska Sportfish Outreach Coordinator working to protect native spawning grounds in the Tongass National Forest. No bones about it…Mark’s one busy dude.