Bridge Tributary Shooting HeadLONG LINE ADVANTAGES IN SHORT LINE TERRITORY. The Tributary Spey Line is an easy casting, medium short shooting head that strikes an appreciable balance between lines both long and short. Designed as a full floating head the Tributary is geared for moderate to large sized rivers and small to medium sized flies fished on monofilament leaders or light polyleaders. Line lengths in this range of shooting heads are geared to fit the most common North