[tlb]

A naive estimate of accuracy is that, at a rotation speed of 5/sec (1800 degrees/sec) a 1 ms error in release time causes a 1.8 degrees aim error, or 3 yards at 100 yards. You could hit the broad side of a barn, but not a buffalo.

But humans can’t reliably time things to 1 ms, and good slingers aim better than that, so there’s more to the technique than the naive version.

[codemonkey-zeta]

You assume the stone is released along a circular path, but that isn't quite right. When you release the stone you extend your arm forward, changing the arc of travel.

[datsci_est_2015]

Ah the power of elliptical motion!

[kqr]

I would assume sling release is not done by timing but by proprioception.