No less an authority than Dave Hughes recommends a DT one weight heavier than rod weight for 30 foot casts and dry flies.

Before I read Hughes' advice, I bought a 5 wt. DT for a 5 wt., 9 ft. St. Croix Ultra Legend and was disappointed as the cast seemed to fade with a #12 Elk Hair Caddis or similar fly.

Would a 6wt. DT have been a better match for the rod?

Before I spend $60+ for a line I may not want to fish, I ask your advice.