I used the 180 grain Nosler partitions, and they worked well. About half would exit, the other half would be found under the hide on the opposite side, usually weighing around 65%, give or take. Most of the front would be gone, the mushroomed rear is what penetrated.
I've since switched to the 200 grain partition and haven't recovered one yet. I like the partitions because the front portion almost always violently expands and seems to me causes more damage than accubonds or x bullets through the lungs, yet the rear still gives you the penetration. Nothing wrong with barnes x or accubonds Ive used them as well, I just prefer the 200 grain partitions for the reasons mentioned above.
Ive had the same experience with the 180's shot from 300 magnums. Also made the switch to the 200 partition. They shoot flat, hit hard, penetrate deep and dont bloodshot the meat as much as the 180. Win win. I've even made that switch with my 30-06 rifles. No complaints
