When there are limpers on the table then there is a raise and we have a good hand to 3 bet and we should also punish the limpers. for example 3x the raise plus the limpers?
So, I'm assuming you're in late position and not on the blinds. If on the blinds, that means you are first to act after the flop. You better have AA, KK, QQ, or AK if you're going to do this, unless you are trying a squeeze play, and that is another conversation entirely.
If you're in late position with a "good hand" (however you define that), then you should raise about 3x the BB + the limpers. For example, if it's a $1/$2 game, if you have three limpers before it gets to you, raise $6 + another $2 for each limper (i.e., $12). This is just a baseline...$15 would probably be okay, but don't go too low, because then the limpers have
odds to call you.
I think you are mis-understanding the term "3 bet." As I understand it, a 3-bet is when someone raises and then someone else RE-raises. That's a 3-bet, to me. If you are just considering an open-raise to a bunch of limpers, then you are not 3-betting, you are simply raising (open-raising, because no one else raised before you).
If there are a bunch of limpers, someone raises, and you are considering a re-raise, then that is a 3-bet, and you better have a strong hand, and you better make it a good raise to get some hands to fold, giving you +ev on the flop.
I mis-read your post. You defined 3-bet correctly. My bad....I apologize. Yes, I'd raise 3x the raise plus some of the limpers. A little less, a little more in some situations. Nothing is clear-cut in poker
Someone please correct me if I'm wrong
.