I'll assume here full stacks and that you have a tell (whether by overall raises, betting quantities or whatever) that your opponent is raising a LOT of less-than-premium hands.

Pretty classic in the casino 2/5 games around here is the $15 raise on suited connectors, or AX or trouble hands, also little pairs, although I saw some players yesterday making the $15 raise on AA, presumably making use of this typical tell.

Anyhow, if the range of hands is very wide, then it's basically just a glorified limp, as I see it.

One response I've been considering is to auto-re-raise JJ-AA and AK, also making the re-raise fairly small, so that it's easy to get away from the weaker of these hands if they pop you back. Say they raise to $15, then I think $45-$50 works pretty well in a 2/5. If it's $20-$25, then maybe more like $60-$65 for the re-raise.

However, the same old problem of the raiser starts to occur that occurs everywhere else: If the flop has a straight showing, at least the SC raisers may have hit it, whereas on my suggested hand range, they know you didn't. I had a KK hand yesterday (which I didn't re-raise, although I really should have) where my opponent definitely capitalized on that fact.

I really think at least SOME percentage (possibly all???) of SCs and middle pairs (66-TT) are very convenient to have in your re-raise range against this kind of loose raise.

The question in my mind is really what percentage, and also whether you should be pretty much equally inclined OOP or in position, or whether the percentage should be higher with position. On that one, I'm inclined to say that it really doesn't matter. With position, you give them the opportunity to take a cheap stab that will actually work most of the time on your own loose re-raises. OOP, it seems to me like the effectiveness of your initiative increases--since now they need more of a hand to continue.

As to percentages, just calculating it out as I post this, if you re-raise the premium hands always against these raises but the deception hands 50% of the time, you get a total re-raise percentage of 7%. I think that's a bit too high--particularly since the loose raisers are going to be raising quite a bit anyway. If the stacks are super-deep, then you might want to go that high (or even to 100% re-raises on the deception hands), but I think with stacks lower than 200 BB, your opening yourself up to trouble if you re-raise that often.

If you re-raise the premiums 100% and re-raise deception hands only 25% of the time, then you get to a re-raise frequency of 5%, which for my taste is a lot tougher to read and should still give you plenty of deception in there.

Yet another option: Re-raise AA always, but the other premiums only 75% of the time and the deception hands 25% of the time. That leads to a re-raise frequency of 4.4%.

Opinions and preferences? Other alternatives?