Most bonded bullets are heated to essentially solder the core to the jacket. The heating anneals both the jacket and core, making them softer. As a result, the unbonded AccuBonds turned out considerably softer than Ballistic Tips, so your comparison isn't valid.
If by "completely disinegrate" you mean breaking into molecules, then you're correct. But I've seen jacketed rifle bullets break into tiny shards of jacket and core a number of times--including at least one bonded bullet, made with a relatively thin jacket.
