Toggle Mobile

Scientific Anglers Mastery Grand Slam Fly Line


Loads stiff saltwater rods quickly and easily


Tarpon. Bonefish. Permit. All in one day. All on one line. That’s the idea behind the Mastery Grand Slam, a fly line designed specifically to help you achieve one of angling’s most elusive accomplishments. With a short, powerful head the Grand Slam cuts through wind and turns over crabs, shrimp, and tarpon toads with ease. We’ve got the line. You just need the fish.

Designed for demanding tropical saltwater applications.

Loads rods quickly, cuts through wind with ease, and turns over big saltwater flies. Short, powerful head for quick casts to moving targetsOverweighted by nearly a full line weight. Tropi-Core technology for tropical climates

Line Size

WF 10, WF 11, WF 12, WF 7, WF 8, WF 9