I did a test once using a 308 (18" barrel) and 150gr Barnes X (preTSX), 200gr Partitions and 180gr Failsafes. I fired at 50 yards, to simulate normal deer hunting ranges in my area. I had 2" of wet newspaper followed by 2" of dry newspaper and the rest wet. The results were as follows:
150 X, 2694 mv - 11.5" 100% weight retention
150 X, 2661 mv - 12.75" 100%
180 Failsafe, 2445 mv - 14" 100%
180 Failsafe, 2454 mv - 14" 100%
200 Partition, 2239 mv - 11.75" 61%
200 Partition, 2231 mv - 13.75" 79%
It's just a bit of information I wanted to share. I wish I would also have tested some conventional designs such as Speer, Sierra, Hornady, etc. to see how they would have compared.
Pat.