My grandfather made me one out of a leather shoe tongue with rawhide cords. I got pretty deadly with it by the time I was wearing long pants.
They say that before the Dark Ages, military slingers would have to make multiple hits on a head sized target at 200 yards to get hired on. The Rhodian slingers are also famous for throwing stones the size of softballs.
Enjoyed the sling demo as well as the sounds and view of the surf and sand of the Pensacola beach area. The emerald green surf reminds me of a vacation just last year at Fort Walton Beach with the missus. I also have great memories of the surf and sand from my single USAF days while on TDY at Eglin AFB & Hurlburt Field (Ft. Walton) as well as Tyndall AFB (Panama City) back in the mid & late 1970s.
when I lived on Guam my local landlord told me they could sling a football shaped stone or fired clay projectile through the body of a spaniard during their revolt. he got a sling out and threw a stone into a palm tree to show me .VERY impressed!