Pretty interesting hand. I like your line of cbetting and then shutting down on the turn if you don't pick up more equity. I am interested as to why the J seemed like a good card to represent? Hands that you would check back the J on turn would be KJ AJ 10J. Hands you would fire another bullet would be QJ KQ AQ any sets or two pair. And I guess AK as a semi bluff. I think you have a very good perception of his range by the time he check raises turn. It screams a flopped set to me, or QJ on turn. With QQ being the least likely set obv cause he just flats pre. But 777 333 and QJ will be in his range a ton. I think his value range is really narrow, but there is some air left in his range. You make a good point that his perception of you is probably as a random, losing nobody. I think he is going to expect you to have AK here a good amount and not give up on it. But I also think he could put you on jamming value hands as low as AQ and 2 pairs. So I really dont think he is capable of folding QQQ on river. Seems like a gross spot to have to fold a set of 3's or 7's i know i personally would fuck it call with a sigh. Folding QJ or air seems like the most likely thing.

In general I dont like your line after the turn here because there are such few scare cards you can represent on the river. And you have literally no equity. Bluffing with some equity is always better than bluffing with no equity. Calling to bluff is a great move but I think its best to this with a wet board when a lot of scare cards can peel the river, and you are quite confident opponent isnt drawing. A board as dry as this it seems like there will be such few scare cards. I really think the 10 was the only card he could possibly fold a big hand on.