Chief,
The Redding is capable of extreme roll crimping. In standard roll crimp dies the case below the mouth will deflect outward and lose contact with the bullet bearing surface if you crimp really hard. The Redding hugs the sides of the case so that can't happen. Very good concept. The Lee Factory Crimp die will iron out that bulge on withdrawal through the die, but it likely slightly undoes the crimp in the process. I think Redding has a winner, especially for high recoil handgun rounds.
Marshal,
I actually tracked those cases because I was interested in the phenomenon of case shortening in the .45 ACP with each reloading cycle. About half had been lost either to the range gods or to splits by the time I was done with them. The head stamps all looked like tattoos that had faded with age, and the rims were well mottled with dings from ejecting onto stones and concrete. I can't recall how many splits there were in total? I didn't track that. What I can tell you is they were all about 0.025" shorter than when they started, so half a thousandth per load cycle was the normal shortening. The loads were all either 3.8 or 4.0 grains of Bullseye under either 185 or 200 grain cast semi-wadcutters. Light loads.