Lee's precision collet neck sizer die for .243 Winchester uses a collet and mandrel system to minimize case neck runout without requiring lubrication, delivering consistent bullet seating for improved accuracy.
The Lee Collet Neck Sizer Die represents a refined approach to case preparation for serious handloaders. Rather than relying on traditional sizing bushings, this die employs a collet mechanism that gently squeezes your case neck against a precision mandrel.
The collet design creates a precisely aligned case neck while dramatically reducing runout—the wobble that degrades accuracy. By sizing only the neck and leaving the body untouched, you preserve case dimensions and extend case life.
This die is built for those who understand that accuracy begins with consistent case preparation. The collet system delivers the kind of neck control that separates competitive and precision loads from ordinary ammunition.