[sweetjazz]

You can't tell from such a small sample what seat 1's range is for open-raising in the HJ. It appears he has correctly loosened his requirements significantly, so you should adjust to that appropriately.

However, three-betting with T4o is still a bad idea because (1) after just a few orbits, I doubt you have built up a lot of fold equity at this point, which is what you need to make this a playable hand and (2) there are still three players left to act and while they may be tight and passive, having one of them enter the pot (which will happen about 10 - 20% of the time, say) puts you in a bad spot where you will have to fold most flops and proceed carefully when you do actually get a piece of it.

The table conditions you describe make 3-betting with T4o much better than it ordinarily would be. Unfortunately, it would ordinarily be a very -EV move and now I believe it would simply be a slightly -EV move.

Even T8o would be pushing it and a hand like T9s is probably marginally profitable to 3-bet here. Of course, you are doing this largely for metagame reasons. You are trying to induce your thinking opponent to tighten up his open-raising standards in the HJ and CO, to induce into making bad calldowns later because he saw you 3-bet T9s before, and to generally have him think that you a LAGgy fish. So this is basically a play that you should stop making once you have shown it down once. And just because you got away with it the first time (say winning a pot without a showdown) does not mean you should continue to make such plays. Each time you make such a play, it generally lessens the EV of future plays (because you raise the suspicion level of your thinking opponent that you are 3-betting light).

So I am not willing to completely dismiss this type of play in specific game situations, but I don't think T4o is the kind of hand to make a stand with in limit poker, where your cards always do matter to a certain extent because you are limited in how much pressure you can put on someone to fold. And I have seen many players who try to make such plays overdo it to the point that they become the LAGgy fish that you are supposed to appear like. (Of course, most of them simply are LAGgy fish.)

So keep exploring metagame plays like these, but realize that it's possible to both underuse and overuse them.