Started using a sling when i was 12 , 36 years later I have to say I was better with one when I was 12-14 , I can remember , hitting a Chicken , a Cow ,, the family Dog and the rear window in a passing VW Beetle ,, without having to say it ,I didn't use one or sit down right for a few days . Once I earned (Taught by my Stepdad) Respect for it . I found that large marbles and River rocks flew true more than anything else I could find , but a steel Ball was KILLER .