Most full metal jackets tumble in flesh. The designers deny they did that deliberately, but only the Swiss have taken pains to insure theirs do not tumble in flesh.
From what I'vbe seen with shooting BIG pumpkins with FMJs I would have to disagree. Btween a buddy and me, we put about 20 FMJs from a 30-06 through a large ~50lb pumpkin and couldn't discern any damage until we looked at it. Every bullet left the pumpkin the way it came in- flying straight and true. I'm not going to say that its the same as shooting flesh, as most aniamls don't have 2" of tough rind covering them.
i would nevber use fmjs for hunting.