PhilKing, on 2013-August-29, 16:00, said:
That's not a lot of missed 3NT. It's a few where it has play, plus you will get to a load more that have zero chance.
♠xx ♥Qx ♦Txx ♣KQJxxx is not a preempt opposite a 1♣ opener. It's good mixed raise. Why would you get to loads of 3nt with zero chance ? Partner should be mindful that a mixed raise can be on ♣ length or a distributional hand with minors, so he won't be trying for 3nt on hands with lots of high cards unless they included Aces as in my examples.