(55) bluff this river?

[otctrader]

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i thought that villain would fold any Jx there, except maybe QJ. of course, he insta-called with J4s. i guess that's what i get for ignoring the J8o limp.

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Bah, donks will be donks - note it and stack him next time; I think the only way you would get him off his J4 would be shoving the turn which I'd be leery of doing given he called a dry flop. If it was J4 of clubs (you didn't say), he's calling regardless.

As far as flop bet size goes, I think your'e fine - anything between 1/2 to 3/4 is standard here, doesn't give away your hand and leaves you room to play. He's calling a PSB with his "monster" anyway.