Because it does not accomplish what a raise is intended to accomplish... thin the field.
In a cash game your open should be the table standard. Sometimes thats $20-$30 at a $1/$2 Table, sometimes it's $7.
In the 5/5 Game I regularlly play the average open varies between $30-$50 typically. Thats 6-10 BBs
In Vegas at the 2/5 Tables, the opens were generally $25-$30, with some tables being in the $35-50 range.
Never however, is raising 2.5 BBs in a cash game standard and never will it accomplish what you intend it to, since all hands which would come in for a limp will come in for this raise and the blinds will also call with a very wide range of hands if a few players are in, since its not much more.
Never less than 3.5BB's, I personally wont come in for less than 4
Late in a tourny I like the 2.5 BB approach IF it works like TP said.
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"Most of the money you'll win at poker comes not from the brilliance of your own play, but from the ineptitude of your opponents."
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