Made a new clip only to discover that one of my cameras was not filming.... so no video evidence but here is the situation and the conclusions:
I lengthened my sling from 37 to 50cm be able to hit the target at 30m more easily.
At 10m results stayed the same as far as accuracy.
At 20m I struggled to reach the target but after 30 practice throws got the same results as the shorter sling.
At 30m I had the same problems reaching the target with the 50cm sling as I did with the 37   Only way to reach the target was to aim higher then the actual target.  If I were going for distance I can understand that but I thought 30m should be a distance you can just aim for; or am I wrong?

Am I missing something for 30m distance?  My ammo is only 30g should I try something heavier?

Und noch etwas ist zu beachten. Die Stellung Ihres Rotor verändert sich

Shakli wrote on Jun 27^th, 2020 at 5:06am:


You need to aim much higher to hit at 30m. I am not surprised that 30g ammo has a hard time reaching the target. My 143g lacrosse balls trajectory is much lower when I throw, so 30g must really drop off quick (wind resistance). I would follow Jauke's suggestion. Rusty balls are really nice. They can take some punishment. I can sling them as hard as I can and they don't break (yet).  But you can sling them soft too and they won't go far, as long as there is some sort of backstop.

Rat Man wrote on Jun 27^th, 2020 at 4:24pm:

I agree with this, 50 cm is pretty short (this is folded right?) My preferred length, if I put my arms at my sides and hold the sling normally, it is a few inches above the ground. For me that is 27" (~70 cm).

30 grams is too light for ammo. Try 100 to 125 grams.

Thanks so much for the info.  Going to first make some rusty balls at around 120g-150g,  see how that goes before I change a second variable.  If I still have a problem then I will go for a longer sling. 

I use Greek style release not sure how much that makes a difference.

I was doing terribly at the International until I switched to Greek and got MUCH better results. It really does seem like a good style for accuracy but not necessarily for power.

For sling length, my current longest sling is a simple paracord sling that's 142cm centre of pouch to release knot. It's pretty darn huge but actually easy to use with the right technique which I think is true of all slings. A video David put up of Puchi slinging in Mallorca is what finally made long slings usable for me without hurting my arm:

https://www.youtube.com/watch?v=yGmnXHQxi0E

Starting off the sling across the back or across the shoulders gives it that starting momentum that makes it possible to use without having to resort to the very inaccurate pirouette.

For other lengths, it's just practice and getting used to them and then understanding their limitations. If you have a 20cm sling, don't expect to throw across a football field, but that also doesn't mean it's useless. A quick overarm throw at short distances would suit it nicely. Know your sling.

Ok just tried 120g and 150g rusty balls.  With the 50cm sling I get the exact same results as I do with the 30g rusty balls. 
Easy to hit 10m
Not bad at 20m
Have to aim high to hit the 30m

Then used a 140cm sling using the back release from the video Kick put up in the link.  Super easy to use and on my first attempt going gentle my 150g rusty ball soared over my 30m target coming to rest 60m away.

So my conclusion:  It is all about the length of the sling.  Weight of ammo from 30g to 150g seems to have no affect on distance with a short sling.  (With the longer sling I could not feel the 30g ammo and was not able to fire it properly)

Tomorrow I will cut down that 150cm sling to 70cm and see if that is long enough to hit 30m without having to aim high.