Scientific Anglers Mastery Trout GP Fly Line

New for 2026, the Scientific Mastery Trout GP Fly Line- General Purpose Trout Taper. This line is one quarter size heavy and a fly casters dream. They call this "The Casters Fly Line". Available here in the legendary Mastery series.

Fully-featured with a comfortable price tag describes Scientific Anglers Mastery Fly Lines. Mastery Fly Lines offer a number of advanced qualities starting with SA ID for easy line identification.  The AST additive provides slickness and durability, while Welded Loops allow easy change of leaders and attachment of backing. 

* Mid-length head for exceptional mending and accuracy at distance
* The casters line
* Braided multifilament core
* Utilizing the tapered belly from Infinity, Trout GP has a slightly longer front and rear taper and ¼ size heavy weight scheme. Compared to Infinity, Trout GP leans more finesse but is still a capable general purpose trout line. 
* The choice for anglers who don’t consistently fish heavy rigs like large streamers or bulky indicators.
* Available in 3wt- 6wt
* Color is SAGE

Features  AST Coating, SA Line ID, Welded Loops

SA Mastery Trout GP 3wt WF-F
* 30' Head Weight: 110 grains
* Total Head Weight: 155 grains
* Head Length: 47 feet
* Total Length: 90 feet

SA Mastery Trout GP 4wt WF-F
* 30' Head Weight: 130 grains
* Total Head Weight: 190 grains
* Head Length: 48 feet
* Total Length: 90 feet

SA Mastery Trout GP 5wt WF-F
* 30' Head Weight: 150 grains
* Total Head Weight: 225 grains
* Head Length: 49 feet
* Total Length: 90 feet

SA Mastery Trout GP 6wt WF-F
* 30' Head Weight: 175 grains
* Total Head Weight: 265 grains
* Head Length: 50 feet
* Total Length: 90 feet