Max Q has little to nothing to do with breaking the sound barrier , the shuttle is moving over 1,000 MPH less than a min after take off , at 7 min its at nearly 17,000 MPH.
I have seen planes break the sound barrier many times at low level over the Gulf of Mexico and not once have I ever seen the so called "barrier" that is supposed to surround the plane like is seen is some of the internet chain E-mails nor have I everheard a plane break the sound barrier when it slows back down to less than the speed of sound.
I honestly can't see a bullet flying along and the instant it goes transonic totaly destayabilizing like it was kicked in the butt. Again I'll bring up the point of bullet shape and its needed RPM to stabilize it. For instance lets shoot a 115gr Berger VLD out of a 30" , 1-14 twist barrel at a speed of 3300 fps at 200 yds it still going to be well inexcess of 3000 fps yet the bullets will be so destabilized that they will hit the target sideways , now the Berger 115 has a very high BC and is a remarkablely long bullet but it requires a very fast twist rate , but if you spin this bullet at the required RPM's and it will shoot accurately even as it falls below the speed of sound.
Si Vis Pacem Parabellum