The pouch size is actually very practical.
Bear in mind that the traditional south and central american slings, as well as the tibetan ones, are made for use with animal herding and general herd protection.
You want to deter a wolf, a big rock will do a much better job than a small one.
So you're not doing prissy modern europaen target shooting with nicely shaped beach stone and clever manufactured ammo.
You're grabbing a hunk of dried mud and lobbing at at the lead animal to direct them away from where they want to go and towards where you want them to go.
A small pouch will struggle with large rocks or lumps of dried mud.
A large and flexible pouch like that will fit and happily throw just about anything.
Even smallish stones will probably throw quite well.
The weight of the pouch doing a lot of the work for any light ammo.
So - yeah - that's a totally utilitarian, working pouch, meant for everyday use with whatever you can pick up from the ground.
Everything from medium size stones to lumps of dried animal dung.
The close woven texture will also be quite wear resistant against the sharper edges of ordinary rocks.
The tibetan slings tend to have really long cords. as they often double up as a tump line for help in carrying things.
The shorter cords on that sling very clearly say: everyday farm use - as a sling !
We know that slings are still very much used as working tools in mexico, and that's definitely what you have there.
I like it
Great video teg - interesting to see how you go about deconstructing and replicating something like that from scratch.