My thought was resetting and using the seating die and crimping die for both? I'm doing .45acp so I'm good on the shell plate and knew funnel will work for both. I'm not rich, took a few years to save up for my 550, so the more I can do with less is better. I think after these I get these 2 calibers, I will only need 5.56 and 8mm mauser. Oooh forgot about 303 british, I might have to many firearms, naawwwww.