Hornady seating dies are made a little differently than others. There's a spring clip at the bottom. Remove that, and the caliber specific sleeve and the seating stem come out the bottom. There's a crimping ring/ledge machined into the inside of the sleeve. Put it back together, and the settings don't have to be readjusted.
Some of their sets (454 casull) come with separate taper crimp dies. But the seater is the same P/N as the 45 colt, and will roll crimp. I really like the roll crimp mine puts on with lead bullets and deep cannelures.
Andy