so here is the scenario

RFI 3bb , IP Flat and SB 3 Bets to 13bb -
In EP snowie thinks 0.33p is best
In MP and CO snowie 4 bet Jams for 100 BB


any1 any thought?

FYI when using 2.2BB RFI snowie 4 bets 1.0 Pot. I am pointing that out because snowie is committing more BB with a potsized 4 bet here than it would be comitting with a 0.33/0.5p 4 bet in the first scenario.


What 4 bet size do you guys usually use in LP vs a Squeeze from OOP and the caller IP

i 4b to like 28-30bb if we're 100bb eff.

FWIW you shouldn't really ever 4b more than 1/3 of your stack.

okay...

do you have a flatting range here or is it just 4 bet or fold?

yes

A true GTO solution would use multiple 4bet sizings, including a jam, and it would also have a calling range. However, this isn't practical, especially when you get into the minutia like using 1/8th of a combo for 8 different things, etc. Also, it doesn't add that much EV to utilize multiple sizings, a jam, and a call range, vs one "normal" 4bet sizing, and a call range. Of course this is all from a theoretical standpoint and utilizing different bet sizings for exploitative reasons can add a lot of EV.

In practice I like to use only one 4bet sizing (adjusted for stack depth and position) and also a calling range. Facing the exact action in your example my 4bet sizing would be similar to what brokenstars said, 28bb~.

As a general rule, when OOP preflop you want to 3bet/4bet bigger than if you were IP, and as another general rule as stack depths get deeper you want to 3bet/4bet bigger than if stack depths were shallower.

Vs a squeeze specifically, seems like 100bb is exactly where its close between having a min 4bet range and a jam 4bet range. I don't think its correct to have both, its probably one or the other. At 90bb I think only jam is better (but with a wider 3bet flatting range), and at 110 bb I think min 4bet is clearly better.

Vs just regular 3bets, 4betting to 23bb or so seems clearly best.