It functions by using a Collet to squeeze against a precision mandrel, creating a precisely aligned case neck for a perfect bullet fit while reducing run out, resizing your cartridge case neck to exact measurements.
Sizes only the neck and requires no lubrication.
Features & Specifications:
• Calibre - .303 British
• Includes Collet Neck Sizing Die Only
• Thread - 7/8-14"
• Manufactured in the USA