I've got 4 or 5 that were crimped but have been shot. The crimp is still very visible. I also own a 10ga brass case hand roll crimper. I've expermented with it a little. Overall impression is that the cases would have a very short number of reloads. I've also seen 3 or 4 different ways to crimp brass cases. The least destructive would be slightly rolling the mouth over. The 10 or 12 point star crimp really destroys a shell quickly.