Thanks for the comments, fellow slingsters! The sling was about 33-35" long from fold to knot.
Pocket was 2 pieces of 1"wide x 7"long nylon webbing. Each end of each piece was coated with plastic glue to make a 1" square of almost-solid plastic. Each of these squares was then drilled in the middle and a 1/4" brass grommet installed.
Cord was 1/8" braided nylon. The 2 pieces of webbing were crossed to make a pocket. The ends were lapped over each other, and tied together with the cord. This makes a great pocket, cupped in BOTH directions, AND expandable. There are photos of this pocket someplace on the forum.
I cant remember for sure, but I think I was just pitching a tennis ball for this demonstration. There's a big farm field behind our house, ....which is now full of rocks & golf balls
That sling & easy delivery is good for about 100yards with roughly ellipsiod ammo of about 80grams weight.
BIG question: Will it impress chicks?? mgreenfield