For many of us right handers with the right hand high, we often tend to over power the cast with our upper right hand.
A couple of months ago during our really hot spell in July and when most of N California was on fire or could be, I went to a local small park to practice cast a switch rod on the grass.
I set up a Perry Poke and was casting a Skagit 350 with my Meiser 5/6 Switch rod.
As usual, I often overpowered the stroke with my right hand.
A truck pulls up, and a guy I had never seen, got out and stood by the truck and yelled at me to let go of my rod with my right hand death grip, and to cradle the rod with thefingers on my right hand as I neared the top of my stoke and released the shooting line held against the rod handle with my index finger and middle finger. You still cradle the rod with your open fingers and unclenched right hand
It took a couple of tries to get everything coordinated. Then, I stopped over powering the rod, the shooting line ran out correctly, I had some good loops and casts improved.
The guy hollered, "Now, you got it!", and he drove away. I still have no idea who he was.
Since then, I have used this system with that switch rod and other switch rods with Skagit lines, and the results have been good.
With my Z6126, the ASF 6/7, the Rio
15' Spey Versi Floating Leader, the results have even been better. I get good results with the double and single spey as well as with the Perry Poke. Another benefit, I have less operator error releasing the running/shooting line with my fingers holding the line against the rod.
I guess releasing the rod with my upper hand/fingers besides lessening the over powering forces a
semi death grip on my lower left hand holding the expensive rod, reel and lines. Somehow it seems to work out on the grass, by a lake side and in a river.
I used to see Loops while casting
only when I looked down at the Loop Reel on the rod. Most of the time now,
I have reasonable line loops which unfold in a proper manner. Also, the belly of my line doesn't hit the water as much as before during my casts.