Hello, again, 6thMissp (Joel):
As we have discussed via texts and phone, 50-70/90 Sharps cases can be made into 56-50's without mouth reaming
I have used STARLINE's for this. They have the larger rim OD for the blade extractors. CH4D dies work well, as do the Lyman and RCBS sets I have tried. Probably wise to anneal after cutting. Thanks for your generous help with the original Spencer cartridges. Smiles.
El Supremo/Kevin Tinny