After reading this whole thread, it appears to me that what Frontier Gander is actually describing re: Power Belt bullet performance is that when over-driven by too much powder, they tend to fragment (like Cayugad said), and the fragments do a horrendousjob on the internal organs, butthe exit wound is made by what's left of the base of the bullet. That would explain small entry and exit wounds, but a lot of internal damage. So, IMO, it is NOT a case of faster bullets expanding LESS than slower ones-(that just does not happen to any expanding bullet!)

In the above described action, then, an over-driven Power Belt is performing alot like a Nosler Partition bullet, which also often shows small entrance and exit wounds with great internal damage. I have often heard people complain that the Partition bullet "just pencilled through- it did not expand! But the bullet is gone, so they don't know!! Such actionindeed results in quick kills but often very poor/non-existant blood trails.

In the case with the Power Belts and less powder, slowing them down indeed alters theirperformance, so that the entrance wound is still small, butthe ext wound is much larger, BECAUSE THE BULLET JUST EXPANDS AND DOES NOT FRAGMENT at the slower speeds. The expanded bullet exits, leaving a bigger hole than it would if it had fragmented.

Frontier Gander, you sure have some beautiful places to hunt!! Keep up the good work, and thanks for your research and information!