Either Sklansky or Harrington reccomend varying your PFR size to keep your opponents guessing.

What do you do?

I just always raise either 3xBB+1 or 4xBB+1 in real life depending on how many chips I have and how likely the table are to call, and online I usually just mash the shit out of the pot button, sometimes rounding down to the nearest 50/100/1000 in tournies just to keep things simple.

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