Yes Thearos, the advantage of tungsten over gold is that tungsten is very strong. A gold projectile would deform after one throw, while a tungsten projectile would be reusable and cheaper. I'm hoping to get my hands on a copper-tungsten alloy, which would look a lot like gold when polished.
Over the past 2 days I optimized my "gold look-alike" aluminum bronze alloy, which I intend on making 70g projectiles out of soon (more to make myself feel rich than anything else
). I might try selling a few if anyone's interested. My aluminum bronze has a density of about 7.3g/mL, so it's nothing compared to gold or tungsten, but it's extremely strong and the bright color makes it easy to find in the grass after you sling it, so it's actually pretty practical ammo for target slinging. Here's an image of a little 75g heart I cast out of it for my girlfriend as a valentine's day gift:
Matthew, those are interesting ideas! let us know how they turn out if you get around to trying them.