Very interesting project, what rifle or pistol are you going to use? I suppose a full power sub 12ftlbs rifle would give you the most bang for your buck.

Not sure what you could use for clay's. Off the top of my head I'd suggest using upside down silicone bowl lids as moulds and pour in some thin layers of plaster or jesmonite.

https://www.amazon.co.uk/Silicone-St...84304895&psc=1

The various sizes would give you options for what can be hit. No idea what to use as a launcher, other than a jury rigged catapult of wood and bungees. Maybe get someone to roll them along the floor, from behind the firing line of course, or hang them from a sloping line so they can slide down from one side to the other.

This is what you really want:
https://www.youtube.com/watch?v=BaT8NZMy9YM

Cheers,
Matt