Royal Wulff's Triangle Taper (TT) Lines are especially well-adapted to roll casting. They have a relative long, continuously increasing taper from the tip 27 to 40 feet, so roll casts are easier. I often use these lines on my bamboo rods as well, since that taper seems to bring out the best in those slower action rods.
Here's a blurb from their website on the TT lines:
The Triangle Taper is a continuous forward taper in the head of the line, the first 27 to 40 feet depending on the application. This provides the most efficient transfer of casting energy as it unrolls because the heavier line is constantly turning over lighter line. This design also gives you a more delicate presentation because the weight is away from the fly. It is also the finest roll casting line for up to 60’ casts. The combination of a long weighted section and a light running line make the triangle taper cast like a shooting head for distance.
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