tell me what you think his range is when he checks the river. count the number of hand combinations in it. then tell me what parts of that range you think he will call with against:
- 1/2P bet
- 3/4P bet
- PSB
- 1.5P bet
- shove
i honestly think you chose the worst of the above betsizes. but i'm open to rebuttal if you can explain with non-results-oriented logic why your bet was optimal.
edit: if you don't know how to do the above look up spoons post on counting combinations.