On rare occasions, I manage to chant these two mantras while I'm slinging:
1/ The ONLY! purpose of a wind-up is to move the pocket/ammo to a position from which it can be snapped forward to release.
2/ The wind-up puts NO! power into the ammo.
If I chant this, and do VERY! slow and deliberate wind-ups, my range and accuracy improves dramatically!!
Slings are perverse creatures and cannot be forced to perform.
mgreenfield