with practice you can become quite accurate with a sling-shot. The Elastic sling-shot or catapult is accurate over shorter ranges but takes less practice to become usably proficient. The ancient sling is better over longer range and fires at higher velocity but takes considerably more practice. The shot used also influences accuracy. The more perfectly round the shot the less it will curve in flight. With the ancient sling you can impart a spin to the projectile and if you have the talent you can make use of this to attain greater length of shot. Using an elliptical stone or shot you can get a "frisbee" effect from the spin and get considerably longer trajectory.

The practice required is significant. The ability to feed yourself with a piece of string and torn clothing is also significant.