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Scientific Anglers Mastery Trout GP Fly Line

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Butter / Sage
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Refined Control for Every Trout Stream

The Scientific Anglers Mastery Trout GP is designed for anglers seeking finesse and versatility in one line. Built with a slightly longer front and rear taper and a quarter-size heavy profile, this line delivers smooth presentations while retaining enough power for general-purpose trout fishing. Perfect for those who don’t often throw bulky indicators or heavy streamers, the Trout GP offers delicate accuracy for dries, nymphs, and light rigs across a wide variety of waters.


Key Features


Technical Specs

Item Number Line Weight Head Length Total Length Head Weight Grain Weight
147170 WF-3-F 49.5’ / 15,1m 90.0’ / 27,4m 160gr / 10,4g 105gr / 6,8g
147187 WF-4-F 49.5’ / 15,1m 90.0’ / 27,4m 185gr / 12,0g 125gr / 8,1g
147194 WF-5-F 50.5’ / 15,4m 90.0’ / 27,4m 220gr / 14,2g 145gr / 9,4g
147200 WF-6-F 51.0’ / 15,5m 90.0’ / 27,4m 255gr / 16,5g 170gr / 11,0g
147217 WF-7-F 52.0’ / 15,8m 90.0’ / 27,4m 300gr / 19,4g 195gr / 12,6g
147224 WF-8-F 53.0’ / 16,1m 90.0’ / 27,4m 345gr / 22,3g 220gr / 14,2g

Summary Box



Scientific Anglers Mastery Trout GP fly line offers refined finesse, smooth casting tapers, and versatile performance for dry flies, nymphs, and light trout rigs.