Yesterday, at a gun club "firearms safety" refresher I saw a few pictures of what a 9mm hollowpoint can do to your palm. The guy was taking apart his glock and forgot to unload it. He had three 2 inch gashes in the back of his hand - one from the exit wound, two from hydrostatic shock. There were several 1/2 inch and smaller cuts in his forearm - all from hydrostatic shock.
The bullet managed to achieve full expansion, did loose the jacket.
The case was nickeled, I didn't ask what the round was, but Gold Dots come in nickeled brass and are common with local LE, so it might have been that.
Seeing those pictures made me rethink in a hurry the usefullness of a quality 9mm round.
There is no question that ammo cost is probably the single biggest factor for the 9mm popularity. With so many other gun platforms using this round, any 1911 manufacturer would really be foolish for not continuing to offer the 9. Especially as ammo prices keep increasing.