Sako75, only the rear portion of the Accubond is "bonded". The front portion is not and the bullet acts like a partition loosing the front third of the bullet and the rear portion penetrating on.
I have never heard of the Accubond being described like that. They are designed to act in a similar fashion as the Partition but I'm pretty sure the whole think is bonded.
I seem to recall JB being the one who mentioned that only the rear half or so of the Accubond is bonded. I may be mistaken though. Perhaps he could chime in.
JB has described it thus on more than one occasion. That's HOW it achieves it's partition-like performance. The unbonded front acts like the front portion of a partition while the bonded rear continues to penetrate.
"The front section of AccuBonds isn't bonded, so it fragments much like the front end of a Partition. This is done deliberately to approximate the terminal performance of a Partition. How much weight is retained depends on the particular bullet; as with Partitions, many of the heavier AB's are designed to retain a higher percentage of weight. But the front end definitely fragments."
https://www.24hourcampfire.com/ubbt..._Bullet_weight_Who_downsized#Post4097091
