You have already gotten great advise and I really don't have anything to add. It's really the same thing, but here is the statement from Lee's FAQ on the subject.
_________________________________
Load Master caliber switch
To switch the Load Master from one caliber to another, consider the following:
Appropriate shell plate which runs $29.98
Appropriate case feeder if applicable which runs $25 (Large for .38 Special and larger)
Appropriate primer assembly if applicable, which runs $24.98
Appropriate set of dies which runs $29.98
Turret (optional) which runs $14.98
If the desire is to load the 40 S&W, it is necessary to have the large case feeders but the small case slider. This is very uncommon but is necessary with this caliber.
If the desire is to load the 454Casull, the same configuration is used as for the 45 Colt, however the priming assembly must be for small priming instead of large.
The 50 AE can be loaded however, the case feeder cannot be used as even the large size is too small. It is also necessary to lube the cases as the dies are steel.