Lee Precision .222 Decap Mandrel for .220 Swift

Lee Precision Decap Mandrel .222" – 220 Swift

The Lee Precision Decap Mandrel is the decapping spindle for Lee collet neck sizing dies: it is the element against which the collet fingers squeeze the case neck and, at the same time, it carries the pin that ejects the spent primer. This .222" version is specified by Lee for 220 Swift and 22 Creedmoor, and should be replaced if the pin bends or the mandrel becomes worn.

In a collet die, the neck is not compressed by an outer ring and then opened by an expander, as in full-length dies: four fingers squeeze it directly against the mandrel, so it is the diameter of the mandrel that determines the final internal measurement of the neck. For this reason, Lee makes the mandrels .002" to .003" under the nominal bullet diameter: with a brass spring-back of .001"–.002", the finished neck remains about .001" under the bullet diameter, providing the correct tension to hold it. Lee describes this system as capable of producing a precisely aligned neck, reducing runout.

Main features

• Lee designation: DECAP MANDREL .222"
• Mandrel diameter: .222"
• Lee design undersize: .002" to .003" under nominal bullet diameter
• Dual function: internal neck sizing reference and decapping
• Quantity specified by Lee: 1 piece per die
• Calibers specified by Lee: 220 Swift, 22 Creedmoor

Recommended use

Replacement part for Lee collet sizing dies — Collet Neck Sizing, Micrometer Neck Sizing, and Ultimate Die Set — in 220 Swift and 22 Creedmoor calibers. Lee lists this as a replacement for the 220 Swift (code 91004) and 22 Creedmoor (code 92148) Neck Sizer dies.

Package contents

The replacement part is supplied individually and includes only the decapping mandrel. The die body, collet assembly, and other die components are not included.

Manufacturer code: NS2621