A while back, I shot some bullets that had been loaded backwards in the case. I had read about this trick in a book by old Elmer Keith.
He had found it difficult to find good soft nosed hunting bullets in the late 1930s, and had decided to try pulling some military ball bullets and turning them around so that the open end of the Full Metal Jacketed bullet was towards the front. He hoped that they might open up and work like a soft nosed bullet.
Long story short, he said that they worked out fairly well, until he could find some JSP bullets to load with.
I tried the bullets in a post called Dum-Dum Bullets and the Box O' Truth, and sure enough, they either broke apart or expanded fairly well.