If we assume that rotational velocity (spin) decreases at the same rate as flight velocity the bullet won't be spinning much when it contacts game , depending on range of course. And I'll bet it slows to nothing when it expands...a bullet is not a good flywheel. It's mass is not far from the center.
See if you can find any ballistic gel tests showing spiral lines in the cavity.
Do you notice a difference?
Travis
JB just noted a test or two for that and says rotational velocity does not slow nearly as fast as flight velocity. I don't remember why, but I was surprised by it.
"...the left considers you vermin, and they'll kill you given the chance..." Bristoe