They will use regular dies. But you will need conversion kits for almost every caliber. Tool heads for every caliber make life much easier. Powder dies for each tool head and odds and ends such as primer pick up tubes, primer magazine tubes....
It gets expensive. I just picked up a rl550b and have been picking up odds and ends to be able to load 380,9,38/357,40,45,221,223. Cost a small fortune and I've been picking most of the stuff up used. AR15.com reloading equipment exchange is a great place to find used parts, but you have to be quick as it goes fast.