MEC 600 jr. notch

[Jonathan]

I have a MEC 600 jr.. I have reloaded about 600 12 ga. shells on it. It leaves a small notch at the edge of the crimp where the fold is. Anyone know what to do about this?

[mold maker]

Many years with a MEC 600 Jr. and I never noticed a "NOTCH". A picture , or a better description would help.
Are you possibly seeing the remains of the original spin weld at the very center of the crimp?