The 286 9.3 Partition is one of the models with the partition moved forward, for more weight retention. The abosolute minimum percentage of weight they'll retain is 83% (that's if they lose the front core entirely) and more often they retain 85-90%. I believe the rear jacket is beefed up as well. They penetrate VERY well.
One thing many people don't realize about the A-Frame is that only the front end is bonded. The rear core is not, the reason the rear end of the bullet often expands almost as much as the front end.
In my personal experience with both Nosler Partition and Swift A-Frame bullets, the Partition has consistently shown deeper penetration on game.
