21st Century Black Nitride Expander Mandrel – 6mm

21st Century Black Nitride Expander Mandrel – 6mm The 21st Century Black Nitride Expander Mandrel helps reloaders achieve consistent and accurate neck tension. First, it expands case necks using a precision-ground mandrel. As a result, bullet seating becomes more uniform and concentricity also improves. Therefore, overall accuracy increases. Features Precision-ground in .0005″ size increments • Available from .22 to .338 caliber • Black Nitride coating for low friction and reduced galling • Designed for use with 21st Century and Cortina expander die bodies Dies body sold separately – 21st Century Gen-X Expander Die – SEB Australia (sebshootingproducts.com.au)