It is quite possible that if I had used a 180 gr, I may have gotten a better experience. I have a friend of mine that uses 300 gr AB's and he said he does not have the issue I wrote about at all.
I've shot a number of elk with 180 AB's in a 300 WSM. I've had several come apart upon entry. If they hold together, they'll penetrate very well but they don't always hold together. The amount of destroyed meat on the near side is always very large, even if it doesn't hit bone.