Throwing around the Idea of a Coilgun , can I cast some aluminum slugs to use with it ?
I'm pretty sure a coilgun only will propel ferromagnetic slugs...Are you looking for something like this? https://www.instructables.com/id/EMP-Hard-Drive-launcher/
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Oh, duh... What the hell was I thinking?
You can but solid aluminum rods at places like Ace Hardware. Then you can just use a hacksaw to chop it up.
On wikipedia says the you can use Copper slugs and aluminim slugs only!
Search for melting forge on the site. Plenty of good ways to do it, but work in a well ventilated space and splurge for protection.
Yes, yes you can.