It has been my experience on deer-sized game using .308 caliber projectiles that above 3000 fps, the partition outperforms the accubond in penetration. At such high velocities, the partition may shed it's front section, but I've never recovered the rear section from game. It's been through and through every time, regardless of shot angle on animals weighing over 200 lbs field-dressed. That is still small compared to some plains game, but it's the biggest thing we have around here.
My prior experiences with accubonds has been limited to the 180 grain projectiles. At or above 3,000 fps they seem to "over-expand," shed weight, and not penetrate as well as the partition. However, all of these critters have still been very dead, so the bullet did its job. As velocities fall below 3,000 fps, the performances of the 2 projectiles get more and more similar. In this particular instance, I agree with the other suggestions to use the partition, mostly because it is available in 250gr.
This season, I started loading my .300 wby with 200gr accubonds at a MV of 3100 fps. In my mind, the higher SD of the 200gr bullet should offer better penetration, but I didn't see any whitetails that suited my fancy as test subjects this year (I'm getting pretty picky). There was a coyote that decided to chase off some does that I was watching, which proved to be a fatal error on his part. As one would expect, the 200gr accubond had a pretty devastating effect on him on 100 yds, but that's hardly a good field test.