Thread: WHY do we resize shotgun Hulls when reloading ?

The view of MEC is not very reassuring as I have just located this on another site where another fellow is have the same issue.

"....... I contacted MEC and he told me to check and see if the hulls were brass or steel (attracted to a magnet). If they were steel (which they are) I would need a collet resizer to size them............"

that means their Sizemaster or a 9000 series.....if this keeps up I'm going to have to lengthen my reloading workdesk.