ORIGINAL: Skopia

If a bullet manufacture publishes specific bullet velocities for a given bullet, does that mean if you keep that bullet within those parameters it should not fragment?
For example: I have been shooting the Hornady .430 240gr xtp these past two years with great success. Over 90 gr 777 I'm somewhere between 1700 and 1800 fps. (I'm guessing).Hornady publishes in it's velocity performance table a velocity rating between 900-1800 fps. Are we to assume that if kept within that range that bullet will perform as designed and not fragment on impact? If not, what is that information supposed to mean?