I recommend the Dillon dies if you're getting the Dillon press. My 550 crimps on a seperate station. The Dillon 3 die sets are designed to use the 4 stations on the press. If you purchase RCBS dies, you'll have to buy another die if you want to crimp on the last station. If that's the case, just get the Dillon dies.
------------------
Svt
1911 Addiction
1911 Forums
"Rangers Lead the Way!"