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COVID-19 Update: The Fly Fishers storefront location in Brookfield is now open with the following temporary hours: Monday - Friday 10:00 AM - 5:00 PM, Saturday 9:00 AM - 3:00 PM, Sunday - Closed. We’re still in the shop full time fulfilling online orders. Orders are being shipped as quickly as possible with brief delays - we are experiencing vendor availability issues and delays from all brands.

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Scientific Anglers Mastery Grand Slam Fly Line

Scientific Anglers Mastery Grand Slam Fly Line for Sale
Have questions? Call us (414) 259-8100
Product Number: SAMGS
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    Business Hours
  • Monday - Closed
  • Tuesday - 10:00AM - 6:00PM
  • Wednesday - 10:00AM -6:00PM
  • Thursday - 10:00AM - 6:00PM
  • Friday - 10:00AM - 6:00PM
  • Saturday - 9:00AM - 4:00PM
  • Sunday - Closed

Scientific Anglers' Best Multi-Purpose Fly Fishing Line

The Scientific Anglers Mastery family of fly lines are some of the best, economically priced saltwater fly fishing lines on the market. Regardless of where you’re going or what you’re fishing for, there is a Scientific Anglers fly line for the job.

The Scientific Anglers Mastery Grand Slam fly line is made to conquer three different species of fish in the Florida Key West flats: bonefish, permit and tarpon. The Mastery series of fly fishing line features a short, powerful head that allows for quick casts to moving targets. This floating saltwater fly line from Scientific Anglers is overweighted to help load powerful saltwater rods quickly, deal with troublesome wind, and turn over large flies.

Scientific Anglers Mastery Grand Slam Fly Line Specs
WF-6-F 40.0’ / 12,2m 100.0’ / 30.5m 178gr / 11,5g
WF-7-F 40.0’ / 12,2m 100.0’ / 30.5m 205gr / 13,3g
WF-8-F 40.0’ / 12,2m 100.0’ / 30.5m 233gr / 15,1g
WF-9-F 40.0’ / 12,2m 100.0’ / 30.5m 270gr / 17,5g
WF-10-F 40.0’ / 12,2m 100.0’ / 30.5m 318gr / 20,6g
WF-11-F 40.0’ / 12,2m 100.0’ / 30.5m 368gr / 23,8g
WF-12-F 40.0’ / 12,2m 100.0’ / 30.5m 434gr / 28,1g
*Grain weight for the first 30'

Features of Mastery Grand Slam Fly Fishing Line

The Scientific Anglers Mastery Gland Slam fly fishing line features a whole host of different attributes that help improve your overall fly fishing experience. Some important features include:

  • Special design 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 targets
  • Overweighted by nearly a full line weight
  • Tropi-Core™ technology for tropical climates
  • SA ID – SA MS SLAM WF X F (X = line weight)

Scientific Anglers Fly Line Features

Scientific Anglers Mastery Grand Slam Fly Line for Sale

Scientific Anglers Line Identification

Identify your line with ease. Look at the first 1-2 feet of the tip section of your line and you'll find the SA-ID.

Scientific Anglers Floating Saltwater Mastery Grand Slam Fly Line

Shooting Technology Plus

ST+ is an integreted slickness additive providing constant line slickness even with lear. Cast farther and float higher—for longer.

Scientific Anglers Mastery Grand Slam Fly Line Welded Loops

Welded Loops

Scientific Anglers' welded loops provide seamless line-to-loop transition. Softer landings. Cleaner pickups.

Hot Climate Scientific Anglers Grand Slam Fly Line for Sale


Tropi-Core fly line withstands warm water environments with hard saltwater coating and species-specific tapers.

Here at The Fly Fishers, we inventory only the highest quality fly fishing gear, apparel, and other fishing supplies. We don’t carry cheap, poorly built, inferior performing fly fishing accessories, and this is why we place our full confidence behind Scientific Anglers.


Floating Saltwater Grand Slam Fly Line for Streamers


Ideal for sub-surface flies imitating leeches, baitfish, or any food that swims.

Scientific Anglers Grand Slam Fly Line for Poppers / Dry Flies

Poppers / Big Dries

Extra strength Master Grand Slam fly line handles large-bodied dry flies and poppers.

Scientific Anglers Grand Slam Mastery Fly Line for Hot Environments


You need a special line for hot temperatures. The SA Mastery Bonefish fly line is build to perform in heat.

Scientific Anglers Grand Slam Fly Line for All Climates


The Scientific Anglers Grand Slam fly line is built for excellent all-around performance in mild and hot climates.

Scientific Anglers produces the best lines of fly fishing line available. Their reputation for excellence, consumer praise, and reputation among fly fishermen everywhere make them one of the biggest names in the industry.

Taper Diagram

Scientific Anglers Mastery Grand Slam Fly Line Taper Diagram

Shop all Scientific Anglers Mastery fly line for sale online from The Fly Fishers fly shop.
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