Have never tried the 320 with anything other than Big Game, which got around 2350 fps from the 23.6" (60com) barrel of my CZ 550. Have never hunted with the load, as have found 286's more than adequate--and of the 286's I've used the Partition penetrated deepest, so have mostly used it.
The Partition retains about as much weight as the bonded-core 286 Oryx and A-Frame, but doesn't open as widely, which is the other major factor in penetration aside from retained weight. Have also used the 250 TSX, which doesn't penetrate quite as deeply as the 286 Partition in my media testing, but comes very close. In more open country I prefer using 250s loaded to around 2650, since they have a trajectory very similar to the 180-grain .30-06 and 270-grain .375 H&H loads, a definite advantage beyond 200 yards.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
