Re: casting sinking lines
Frank....WOW! very interesting. You being a Guide in Alaska will know more about sink tips then just about anyone else I know.
I know there is advantage to sink tips, such as having the line float for mending and drift.
I just haven't fished water that I couldn't use a full sink, but I know they are there.
I do know from talking to DEC that if the water is fast and shallow to not be afraid to use a short leader. That the Salmon or Steelhead really aren't that leader shy.