Fast sinker for deep water
Q Could anyone tell me what has replaced the old ‘high speed hi-d’ fly-lines? I have just started flyfishing again and the water I used to fish, the Queen Mother Reservoir, was over 70 feet deep. I would like to fish in deeper waters at the bigger reservoirs. Dennis Moody
ROB EDMUNDS REPLIES: The ‘High Speed Hi-D’ line was a fast sinker manufactured by 3M Scientific Anglers and was the ‘go to’ sinker of competition anglers in the 1970s and 80s. It sank at 4.5 inches per second belly first and had a fish-inducing U-shaped curve. At the time, it was the fastest sinking line available. In the late 1980s Scientific Anglers reduced the length of the line and so reduced its effectiveness, and the shortened version is still available to this day. Airflo have since produced a Di-5 Sweep, a fly-line that also produces a fish-inducing U-shaped curve and I think it is far superior to both the original and current version of the High Speed Hi-D. The Di-5 Sweep is longer, and made on a low stretch core making casting and bite detection much better. It also has the added benefit of being much more resilient than the High Speed Hi-D that cracks up after very little use. Airflo has pioneered sinking line development and a Di-5 Sweep is now usually viewed as a medium fast sinker. Di-7 and Di-8 lines, sinking at 7 and 8 inches per second respectively, are now accepted as the fastest sinkers on the market. Personally, I would always advise that anglers opt for a Di-7 sinking line as this is the most user-friendly with exceptional performance. A Di-8 does sink slightly faster, but is really only used by serious competition anglers and specimen hunters who need to get to those extreme depths. They tend to use very stiff rods to handle the line and in my experience pleasure anglers often struggle with a Di-8.