[daveT]

Rather confused here.

He is over-shoving the pot by 300. I haven't seen to many people push like this on the river without wanting the game to be over. I am also inclined to think that he would bet smaller with a strong hand, begging for a call.

Do you have a specific read on the kinds of hands he likes to bet on the river, and what a turn check is likely to mean?

Considering a level one, he might be checking a strong hand hoping you will bluff the river. With that failing, he may be doing the classic NLTP push, or while holding a strong pair, he is hoping you have a slightly smaller pair that you will want to call with.

I think you can find a better spot to take him out with.

After reviewing this once more, I think we are staring at a group one.