Detect if projectile is gone

[senterpat]

Is there a way to detect if a projectile has hit something? I don't need to get the reference of whatever it hit I just need to know if the projectile is gone so I can do something with a second projectile.

 

I've been trying to use getposx and y, if you use getpos in the console it returns 0 after its gone, but the script doesnt seem to be registering it.