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

Grain Weights - first 30'
3wt = 105 grains  49.5' head length
4wt = 125 grains  49.5' head length
5wt = 145 grains  50.5' head length
6wt = 170 grains  51' head length