[Proofrock]

I don't play at these stakes, but I'm curious about the <1/2 pot turn bet. If I am Villain and I see somebody check-raise the flop and then lead <1/2 pot on the turn, I'd be most inclined to think one of two things:
(1) He has a monster and wants to draw me in / invite me to reraise.
(2) He has a hand like TPTK or QQ that wants to get to a showdown.

If the case is (1), the min-raise will get pushed against and I fold figuring I'm behind. If the case is (2), I expect that my opponent will either call and check the river, or fold right there.

Given this reasoning, were I Villain, I could see myself taking this line with AA-QQ, JJ, 77. i don't see how you can possibly limit Villain's range to JJ, 77.

I don't know what a <1/2 pot turn bet means at 5/10 NL, but I think that it was inviting you to get played back at (especially after the flop check-raise). This is great if it's what you want -- i.e., if you plan to call/push to his raise, but terrible otherwise. Why not bet ~500-600 on the turn? For that matter, any reason you decided against leading the flop? This seems like an ideal place for it.