A few comments:
I haven't tested the 286 9.3 A-Frame, but have some experience with the 300-grain 9.3 AF on both game and in test media. In both the 286-grain Nosler Partition outpenetrated the AF.
This is because the 286 Partition retains just about as much weight, since the partition is moved well forward in this bullet, and the Nosler doesn't expand as widely as the AF. In fact, the 286 9.3mm Nosler Partition will penetrate almost as far as the 286 TSX, and farther than the 250 TSX. The 300 A-Frame does make a little bigger hole, but in my experience the hole made by the 286 Partition is plenty big--and so far it has impressed every animal shot with it as well.
