[steveyz]

My reason for a pf cap would not be to fold out BB or the original raiser, although that would be nice. It is sort of for momentum and sort of for folding equity. Many times in these LP raise/3-bet/SB or BB cap situations, I see the capper taking it down on the flop. The range of hands that your opponents may have is so wide that I don't think it's wise to see a flop and then decide. A majority of the time, there will be overcard(s) and you won't have a set, and you will have no clue where you stand. Are you check raising an KJ8 flop? How about QT7? or A63?

Also note that it's not as if you have great relative position postflop. You would be next to act after the 3-bettor. So it's not as if you can see how your other opponents react to a sure flop bet.

If your opponents are very aggressive and will put you to the test anyways postflop even if you cap, then just calling preflop would be ok.