Personally, I see zero advantage to trying to chase down and purchase a taper crimp die for .44 Special or .44 Magnum. You can adjust the amount of roll crimp from mild to HARDCORE with your regular, common seat/crimp die.

The only downside to a heavy roll crimp on a revolver round is that it works the brass more, possibly shortening it's usable life span. So if you are loading light to mid-level loads and you don't need a monster roll crimp, simply impart less roll crimp. This is nothing more than screwing the entire die body a bit out of the press.

Simple, works perfectly, doesn't require another die and another step in the process.