Hero is in CO with AJs. Stack's about $500. Was way from table, so to come back I had the option of posting $3 or straddling for $4. I straddle.

Villain is on the button and raises to $10. Villain has been playing pretty SLAGgy, raising a very wide percentage of hands from late position. Stack's about $600. SB folds, BB calls, folds around to me. Anyone else at the table I would have just called but Villain had been raising a lot of hands in the last few hours so I repopped it to $25. He calls, BB folds.

Flop comes 10x6x6x. I bet $35. Villain calls.
Turn 10x. I bet $50. Villain calls.
River 2x. I bet $75. Villain shoves for something like $350 more.

Hero?

Incredibly dry board and he shoves over your triple barrel. Pretty easy fold and honestly seems like a fairly bad triple barrel bluff with no other information.

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This.

Pre is fine but I would take a passive line here and plan to check/call one or two streets, since the boards so dry. Assuming he isn't betting huge

Bigger 3Bet size pre

Yeah this, didn't realise at first. $35-40 seems about right.