Yeah, it turns out that they are fake. Even though I've known the guy that I bought them from for years (wasn't a coin shop), it turns out he didn't scam me, it's just that he himself didn't even know that they were fake because they looked the same, weighed the same, and measured the same as real ones (to the untrained eye).
I hope no one thinks that I was trying to pass them off as real, and now of course I can't afford to buy another casascius coin so I'm going to lock the thread.
When I have the money to afford another casascius coin I'll make a new thread.