I have RCBS Carbide Dies with an extra RCBS Seater Die for my 480 SRH. They have worked well for me. I am loading on a Dillon 550 progressive. Like ivoryhunter I seat and crimp in two steps. I believe I came up with a second die set used at a good price being the main reason I did not do as ivoryhunter did and get a Lee Crimp Die.

My advice would be to get an RCBS Carbide Die Set and also a Lee Crimp Die to go with it.

Bob R