Hornady used to catalog bore diameter/caliber specific seaters. Basically, as long as the cartridge isn't too fat in the body to enter the die, they work fine and produce no run-out.
I haven't found them to do as good a job as the Redding and Forster competition type seaters. I've tried 223, 243, and 308 sizes. In the 308 size, the Hornady didn't prove to be consistently better than a regular RCBS die for 300 Savage cartridges.
