Don't know what you mean by "mushroom too early." High-speed filming has shown that almost all expanding bullets start to expand as soon as they hit an animal (that is, if they're going to expand at all). About the only exception is the Berger VLD.
It was a new TBBC, from fresh factory ammo. These have been about at least 10 years now.
I have generally found the new TBBC's to open less widely than the old ones, and to a flatter frontal area, which helps them kill quicker. The old ones use to exoand very widely, but also tend to ball up.
This one did not open super-widely, certainly not as much as a Swift or Woodleigh would have.
JB
