Everyone knows the new PF bet is 2.5 X BB and not 3 X BB
But honestly it doesn't matter. I think the real worry with bet sizing is on the flop, turn, and river...and it can differ whether you are bluffing
or betting for value obv.
So far what has been working for me especially when bluffing/c-betting the flop is too bet enough to get them to fold but not enough to be stuck/committed if they re-raise.
The point is to bet less just in case they are doing what a lot of beginner players do and check re-raise. Although sometimes a stronger bet, undoubtedly is needed in order to get someone to fold, we still want to minimize the amount of chips we can lose just in case we are caught or if we run into calling station(because we will most likely check the turn if they call and we don't improve)<------and this is the likely case, although double and tripple barrelling can be affective, it can also lose you a lot of chips and imo, should be used rarely, unless you have a solid read on them, usually missing a draw.
This same theory can be effective while stealing blinds when they get higher. In position, let's say,we are on the button and the blinds are 200/400. Now I am known to steal with ATC(any two cards) and will always depending on the SB and BB blind fold tendencies, will raise. Now just incase they play back and I will fold this theory is perfect since instead of betting 3 X the BB I bet lets say 2.5, i lose less, not a lot, but less. It's a well hidden min raise
Ok I'm done for now, ranting about this bet sizing stuff