Bender...
I don't think you understand the diameter. These were designed for wind and big flies.
Airflo Intermediate 10' Poly leaders I think are in the 38 grain range. The tip diameter on the Serum Clear Int. tip I believe is .045-.048. Serum tips are nothing like Poly Leader tips at .019 to finish off Scandi lines or Scandi heads themselves that finish in the .038-.042 diameter
The Serum Lines have massive tip diameter from .058-.062 and large back end and tip diameter so they punish wind instead of getting beat down by wind.
Are you guys talking about AFS and Outbound lines being the same line taper viewing a taper profile or actual lines in hand? The AFS as I knew was a fairly long Scandi-ish taper and the Outbound, Outbound Short and Outbound Tropical are a much more aggressive shorter shooting head? I think the Original Outbound taper is still made (just for coldwater at #7') There is still Outbound Short, Outbound Short Tropical (right at 30').
BB~
I understand the effect of diameter and more of it is counter productive because it increase wind resistance and also makes line slightly stiffer.
Fly line mass improves performance in wind and also higher sink rate.
There was a WF line called Rio AFS Outbound which profile was the same as AFS shooting head in data sheet.
It is possible to weight sections of line without cutting it to pieces quite accurately with little practice. My AFS 10/11 is 40,3 ft / 590 gr.
5 ft of tip came 35 gr, 10 ft 82 gr and 15 ft 133 gr. So from 5 ft to 15 ft it is 98 gr and when first 5 ft is heavier than the (common nylon/fluoro) leader butt we don't have to shorten (middle) leader much to make AFS as decent windy day fly line as most other. Also AFS taper casts very beautiful line loops. I have fished them a lot in SW. Mostly Spey casting but occasional overhead casts too when fly is too big for water anchor.
I have at least six Outbound lines and their taper is not what the profile picture impress. There is about five feet front taper, then level line and then about four feet rear taper. When front and rear halves are weighted front has about 48% head mass and rear the rest 52% so they are slightly towards the Spey taper.
Best OutBound taper I have in my lines is Airflo Cold Saltwater 40+ Sniper WF9I clear blue/pale yellow which has 33 ft/405 gr head and its profile is very close to what you can see in Rio Outbound fly line box :chuckle:
Front half contains 55% of head weight and rear the rest 45% so it is good with big flies and straighten powerfully to head wind but its not good for long distance because of taper and short head. Also ridged running line is quite thick=heavy (1,1 mm) which reduce distance when shooting but it does not tangle much either.
Esa