So I use all fathoms for my tuna as well. They work fine and I like them for their bang for the buck and weight. Mine is all gen 1 except I just picked one more new gen silver 25n 2 speed.
Here?s my set up
20-25-30lbs - I use shimano Trinidad in various sizes (12a-14a-20a)
Fathom 15LD2 - 30lbs (50lbs braid to 30lb mono)
Fathom 25NLD2 - 40lbs (65lbs braid to 40lbs mono)
Fathom 30LD2 - 50lbs (65lbs braid to 50lbs mono)
Fathom 40NLD2 - 60-80lbs flyline and night time jigging (80lbs braid to 60/80lbs mono)
Penn int?l 16visx - 100lbs night time jigging (100lbs braid to 100lbs mono then 200/300lbs jig leader)
I had my fathom 40?s blue printed by cal sheets and have taken up to 150lbs bft with no problem.
I like fathom 40 for its lightness when jigging at night especially when fishing is slow and you have to spend lots of time on the rail. Here?s my wife?s first 100lber last season on fathom 40NLD2.
Good luck tuna hunting!
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