Semibluff-jam against aggro

270 hands is nothing. Even worst nit can be viewed as aggressive if he is hitting good hands on that sample. Especially as he is using big sizing. Call flop and evaluate turn.

No, he was actually pretty aggro.
He 3betted 98o, QJo which would be a nit’s worst nightmare.
300 is not a good sample size to seriously evaluate 4bet spots, maybe falls a bit short on the specifics of 3bet spots also, but it’s clearly enough to have a general idea of a player’s level of aggression.

So why not call flop and shove turn?

Because if he barrels turn my jam has less fold equity.
But the call OTF might make sense because by using the large bet size villain polarized his range and my reraise will frequently either bump into the nuts or make weaker hands fold. If he was actually range cbetting there I would expect a smaller size (didn't realize that in-game). Also, I'm not pot-commited if I call once eff. stacks ~120BB.
I had an equity of ~46% against his range OTF, even if he was 3betting ~10% I'd still have ~42% of equity. Idk. Certainly equity/implied odds enough to call, but adding the fold equity of a ridiculously large bet there just seemed pretty good to me.

On flop you need ~34% fold equity(to be break/even) if you have ~35% equity vs calling range.
On turn if he bets again 2/3 then you would need ~29% fold equity as you have ~21% equity against calling range.