Saltwater fly fishing with a heavy fly and/or with a long leader can make casting and slack-less presentations difficult to say the least. Especially if there is any wind to contend with. This line is designed with an extra short front taper. This helps the energy to be aggressively transferred into the leader system, helping to roll out long leaders with heavier flies into the wind with ease. Having your leader and fly lay out straight is vital to a successful salt water fly presentation.
Many times in the salt a quick short presentation is needed, especially if visibility is reduced. The Grand Slam line is designed with a slightly over weighted belly helping to load your rod immediately for those quick short presentations. With many saltwater fly rods these days designed with super fast tapers this line helps to load those rods quick and efficiently.
Since itís very difficult to transfer energy from a smaller diameter section of fly line (running line) into a larger diameter section of fly line (belly), it is critical to have a longer rear taper to help transfer that energy smoothly into the belly of the line. As long as your rod tip is connected to some part of the rear taper when casting, the transfer of energy from your rod into the belly of the line will be smooth and efficient. The Grand Slam Line was designed with an extra long (twice as long as most other salt water fly lines on the market) rear taper to help carry and control more fly line in the air when casting, dramatically improving distance and accuracy casting, which is so important in saltwater fly fishing.
Shooting line and having some distance in your cast can be helpful when saltwater fly fishing. The Grand Slam Line has been designed with a slightly smaller diameter running line helping to increase shoot-abilty there for adding distance all in one.