Old Crab,
I've used all three bullets on elk and other big game, and agree with those who say all will work. But have taken more elk with the 200-grain Partition than any other bullet, including the old semi-spitzer, which was what Nosler was still making when I first started elk hunting in the 1970's. I have yet to recover a 200 Partition of either sort from an elk, whether they were shot from a .30-06 or some sort of .300 magnum, but have recovered 168 TSX's and 180 Partitions from various animals, including some much smaller than a mature bull elk.
Obviously all the animals were dead, but if complete penetration is the goal (personally I'm not all that sure it's essential) the 200 Partition sure seems to do the job.
