My main rod is a TFO TiCr 6 wt. 3 pc. Very fast action. Very tight loops.
My double haul improved because of a much shorter casting stroke
then with one of my slow action rods. And, for me, when I really slowed
down and felt what was going on, and the tension in the rod and line.
and really watching what the line was actually doing after the stop...
it unrolls, I don't know of any other way to describe it...
I notice if my form is off and I jerk the rod tip up with my right hand during the forward portion before the stop
as I'm pulling the line with my left hand (left hand is going by my left hip),
usually the line hits itself or my rod. It's definately a rhythm to the double
for a different take on this, check this video link out:
I practise tight loop double - hauls with my right elbow in contact just below my right rib cage. Maybe twenty five to thirty-foot casts. and I really watch the line ... but the best practise for me is in the dark.
That swishing sound you hear is line speed.
and that's what shooting is
about...sometimes when I do it just right, it's almost startling (how quickly
the line gets waaay out there in front of you).
Most importantly, for me, is feet positioning and how you distribute your
weight over your feet through different phases of moderate distance double-
haul. The longer you extend your arms you have to be aware of where your
center of gravity is located. Sometimes on my forward cast, I almost fall
forward and in catching my balance I screw up the cast and nullify the energy
created. This happens when I correct the forward imbalance by adjusting
my body backwards.
You'll pardon my lack of volcabulary describing the motions...
I learned thinking about the rod being full or empty.