I have some experiance with this idea. The 168's are not designed to expand. The hollow tip is the result of a manufacturing step.
A wildlife control bunch that I know quite well tried the 168's due to the superb accuracy. The results were dismal. The bullet would sometimes drill a hole straight through the deer and sometimes (if a big bone was hit) tumble/yaw enough for decent results. This bunch was killing about a thousand deer a year and has switched to the 165 Ballistic Tip as loaded by Georgia Arms.
The primary weapon is a .308 PSS with a supressor. Another group has used a .270 with 90 grain varmit bullets with good success.
I think the bottom line is that the bullets designed for expansion give much better results.
Giz
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