Is this a common failure mode of the LM317? I tried the simple 1 resistor CC circuit and also got about 7 mA no matter what. To be fair, I'm pretty sure all three of these LM317's have been soldered in backwards before in other circuits... I'm not good when it comes to checking the orientation.
Hmm, they did work when I first tested them after noticing the problem. And I was pulling 500 mA from all of them. Now 2 of them give 6v when set to 5v and one gives 4.8v. I can only pull, guess how much, 7 mA now. Do they usually die this quick or did I get fakes? Who knows. I guess I'll include some in the next Digikey order.