Problem solved. It appears that both the Redding Series A and RCBS dies are problematic. They appear to work the case mouth on straight wall cases in a way that causes flaking (at least on .44spl cases).
The sizing ring on the CH die is a 1/2" deep and sizes to 0.447. After that, it opens up into a rough cylinder up to the threading. The Redding and RCBS dies also size to the same 0.447. I just sized 100+ pieces of the same Win .44spl brass from the same lot with no flaking and no scratches with the CH die.
My 9mm Redding titanium carbide sizing die also has a 1/2" sizing sleeve, so I have to assume this is a good design. I have to conclude that a single sizing ring design is superior to the traditional cylinder design for straight walled cases. I guess I have a few die sets to sell/repurchase, but first I need to load at least one round to completion.
The sizing ring on the CH die is a 1/2" deep and sizes to 0.447. After that, it opens up into a rough cylinder up to the threading. The Redding and RCBS dies also size to the same 0.447. I just sized 100+ pieces of the same Win .44spl brass from the same lot with no flaking and no scratches with the CH die.
My 9mm Redding titanium carbide sizing die also has a 1/2" sizing sleeve, so I have to assume this is a good design. I have to conclude that a single sizing ring design is superior to the traditional cylinder design for straight walled cases. I guess I have a few die sets to sell/repurchase, but first I need to load at least one round to completion.
