I'm running a 10wt for salmon on the big Fraser River and some smaller tributary rivers. FWIW I gave up on fly lines and cobbled up my own weight forward sinking tip out of lead core trolling line followed by a shooting line and then lots of backing.

That lead core gets down quickly in swift current, essential for the waters I fish. Miserable to cast, as are all sinking lines IMO. For the Zen of flyfishing I go to 6wt floating line for trout.

To get the right amount of lead core sinking tip, run lead core through the guides and work some out as you cast on the lawn. When the line load feels right, lay the whole mess down and cut the lead core line off at the tip of the rod.

Added: You have to look closely to see it but the photo below shows lead core tip (purple) tied to a green shooting line which is an old fly line. Heavier outfit than needed for sockeye but the same cast may tie into a big king.

[Linked Image]

Last edited by Okanagan; 04/12/15.