Originally Posted by Dillonbuck
Never did damage.
But I sure ended up with necks too big to properly hold bullets.
PITA when they are primed, and charged before you figure it out.

Yeah, sorta late once they're primed.

You can take material off the mandrel with a drill and sandpaper. Easier to remove than replace...

But don't worry. If you mess up, Lee will sell you a new mandrel for pocket change.

Or, if you give them the diameter you want, they'll send you one.

DF