Snuffy's crimp ring sounds like it's the wrong size. I have used my 45 acp FCD to knock the flare down on 44 magnum cases when loading shot cartridges. His post perfectly describes what it does.
Anytime you get a faulty product of any kind, from anybody. Call the manufacturer and see if they will make it good. Try not to have an attitude when you talk to them. Every one of them, except Lyman have sent me free replacement parts, even Lee. Lee went above and beyond several times by sending parts for long(over a decade) discontinued items I had bought used. The lady just happened to know where they had a few parts left over.
As I said before, you can always order a FCD from Midway, and try it out. If you are not satisfied, you can return it.
Jan. 4, 2007 gasoline $2.10 gal....HMMM?