[apollo1201]

IMPs, NV opps, LHO deals and opens 3S, two passes follow, and you find yourself in an uncomfortable situation with

Qxx
AKQxx
Kx
Qxx

FWIW, the winning call here was to pass, but I don’t think it is the percentage action. In all cases, what is the best action?

[DavidKok]

I've bid 3NT with worse hands than this and I will try it again. Double is also very reasonable, passing partner's possible 4m with spade wastage and poor shape. The two actions that you should avoid are 4♥ and double-and-bid-again. This hand won't play well in 4♥, it is likely you are off the first two spades and a spade ruff, which means you're playing partner for two aces and something extra. The hand is far too weak for doubling and bidding on. 3NT could be a disaster (for example, a minor suit lead or spade ace and minor suit switch won by RHO who leads a spade through) but vulnerable at IMPs I'm a gambler.

[LBengtsson]

3NT looks the best call generally, and I feel most players would make this call, though the state of the match might persuade me differently. Though at red/white, you are not going to pick up a heap of IMPs by passing and defeating 3♠, while 3NT goes down in the other room. So 3NT it is.

[apollo1201]

Thanks guys. Seems I would have been in good company at 3NT

[akwoo]

Hamman's rule (if in doubt, bid 3N) was originally for this situation I think.