Originally Posted by flyflingerandy
The reason the 6wt worked better than the 5wt, would have to be because all fly rods (except Orvis and Winston WT 2-5wt) are rated for DT lines, not WF. To get the same flex and feel, if it is a 5wt rod, that is a DT5F or WF6F, hence why some rods are labeled 5/6, 4/5, etc. Also, the casting feel is a completely subjective thing. Entirely up to the caster.
A double taper 5wt and a weight forward 5wt ---weigh the same in the first 30ft---the rod wont know which one you have on---the dual weights on the rod is a range to compensate for ther casters style, efficiency, purpose and manufacturing tolerances. An experienced caster should be able to cast each line equally well.
now-a-days its difficult for me to find a double tapered line in a store---i looked for a dt6f last week and called 3 stores and the manufactures rep and settled for a 5 and underlined the rod