In the original message from James Sullivan there was an additional line that could explain part of the problem with the neck shot. The line is:
Hollow points need liquid in the nose cavity to expand. Water does not compress and so this pressure buildup in the nose will cause the lead to give way and peel back.
Another thing is that a neck shot is not a sure way to tell if a bullet expands as it is designed. There just is not enough tissue for the bullet to pass through.
As for the XTPs, they look good for whitetail hunting. I have done some testing of the 300 grain and the 270 grain in wetpacks and the expansion (upset) is interesting.
Alex
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