We made some wax slugs using quartz granules. This is used as a blasting medium in sand blasters and is much harder than ordinary sand, so I have read. Let's see how it performs as a projectile.
Check out my Facebook page. I usually post stuff we will be testing there first to get your input.
https://www.facebook.com/taofledermaus
We use both a Sony RX10 II and a Chronos 1.4C high speed camera.
Chronos website! (NEW!)
http://www.krontech.ca/
QUARTZ Shotgun Wax Slugs - Massive Energy Transfer ─ TAOFLEDERMAUS
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