or as Jaegoor said Sit down. Your sling reaches the floor. Few cm above ground. This length is optimal. Pay attention to the nature of the braid. Too loose is not good. Too thin is also not good. Are they an experienced slinger, then ok.
Better a little less speed. I like Balearic Slings for accuracy. Their focus is not in the middle. A sound / brake increases the accuracy considerably.
Look for a stable center. Aim with the navel. The arm follows the hip. Not the other way around . Your shot goes too far to the left? Too much power in the arm. You soon have a pain in the shoulder and elbow. It will form blow on the finger.
Your shot goes too far right? Your belly button does not point to the target. They shoot in the direction that shows their belly button.

Has any one tried using fine chain? i am thinking of trying it .
will small swivels between the components . I would hope that it allows the system to reach some type of equilibrium.

Was ist der Sinn? Warum eine Kette?

Sarosh. Es beruht auf Erfahrung und Beobachtung. Ich versuche eine Erklärung. Vielleicht ist es zu verstehen.
Diese Schallzunge bremst das Ende der Sling ab. Dadurch öffnet sich die sling besser. Der schusslauf rollt besser ab. Der Schuß wird genauer. Durch häufiges schießen, verkürzt sich die Schallzunge. Durch denn schall knall.
Ihre Schüsse werden nach links wandern.
Am knall hören Sie auch mit wieviel Power Sie schießen.
Bei einer sehr langen sling braucht man keine Schallzunge. Sie ist sogar hinterlich. Der lange Schusslauf wird von der Luft gebremst. Durch seine Länge. Ich habe irgendwo Fotos wo man das sehen kann. Bei einem Schuß mit hohen spin, sieht ihre sling wie eine Angel aus. Es wirkt wie beim Fischen mit Fliegen. 😁

Hi I am new to this game but it is fun.please correct me if wrong .
it seems to me that rotating the sling is of consequence only if the projectile leaves at a tangent to the circle.
With my self I notice that I twitch the sling to release which seems to me to be the more important movement .. the twirl acts to break inertia. I am sure it adds something to the speed of the projectile but  the variables must be  horrendous to calculate .for the most part Slinging  is about feel ,at least it is for me not sure about anyone else .

xxkid123
is that I am  a hot potato?

Eudave, stick with what works good for you, and maybe try a shorter sling

Practice practice practice. One of the things that makes slings so interesting is the lack of constraints. You can control timing, direction, speed, and ammo spin (“rifling”) entirely with muscle memory and throwing style. No other projectile weapon has as much flexibility as a sling. That’s also why accuracy is so difficult to master.