RE: 454 dies
I have a set of calipers too just to clear the air.
Driftrider, I make a dummy round for each type of bullet that I use ( LSWC, JSP, WD ... you get the idea ) I use that to adjust the dies. I simply run the dummy up, screw the crimp die down until I make contact and then screw in the seater. hope I was of some help