Originally Posted by aliengenius
Not true. If the big blind is 50 and someone raise to 150, the amount of the raise is 100, so the re-raise must be to 250, NOT 300. A very common error.
If the 150 opened the betting on the flop
, then anyone wanting to raise would have to make it at least 300 (150 bet, then at least 150 more).
But pre-flop at 25-50 blinds, AG is correct.
Some people play a simple "double the bet" format just because it's easier (some of the bar games I deal use this - path of least resistance, seeing as how people drinking and doing math at the same time just causes too many hassles), but the above rule is the 'official' one.
And yes, the answer is the same for a cash game.