Went to the river yesterday for a bit of slinging.
Cool locale on the riverbank with plenty of stones and free, open space. Unfortunately that particular part of beach had mostly old, rounded pieces of brick or sharp bits of basalt. Not the most amazing ammunition.
Brick isn't really that dense and the basalt was too edgy to have any kind of accuracy at all.
Using my cupped, braided string I averaged about 60m (according to Google Maps) distance using a simple overhand throw without pre-spinning.
Twice I found a good sized, rounded and dense stone which went between 85-100m distance, just over a small mud flat!
Found a weird, light ovoid ?stone? I suppose? It was really light so I think it's actually an old barbecue brick
.
Pictures in link below.
http://imgur.com/gallery/Hj7cDqyOn another note, I just can't seem to get the hang of throwing with a pre-spin. Does it actually add range and power or is it mostly for form?