Lee Collet Die Set .220 Swift

The Lee Collet Die Set .220 Swift is a precision reloading die set engineered for handloaders who demand concentricity and repeatability in their ammunition. Built by Lee Precision, this .220 Swift collet die set employs a collet-and-mandrel design that precisely aligns case necks while substantially reducing run-out—a critical factor when working with high-velocity, accuracy-sensitive cartridges like the .220 Swift. This approach produces ammunition with superior neck tension consistency, directly translating to tighter shot groups on the range and in the field.

The set includes a collet die with its mandrel assembly, a dead-length bullet seater die, a shell holder sized for .220 Swift brass, a powder dipper, and load data specific to this cartridge. The collet squeezing action creates uniform case neck dimensions without the flex or spring-back issues common to conventional full-length sizing dies, making this system particularly suited to precision rifle reloading where neck concentricity directly affects velocity uniformity and ballistic stability. The dead-length seater ensures consistent seating depth, another variable critical to accuracy-focused loads.

Reloaders working with the .220 Swift—a classic small-bore varmint and accuracy cartridge—will find this set addresses the specific demands of that round. The collet die design is ideal for shooters loading match-grade ammunition for competition, varmint hunting, or precision rifle work where neck run-out and seating consistency are performance-limiting factors. This is a specialized tool for serious handloaders, not a general-purpose progressive press set.

Lee Precision collet die sets are recognized in the reloading community for their precision engineering and cost-effectiveness relative to other concentricity-focused systems. The included load data provides a safe starting point for working up loads, though experienced reloaders will cross-reference this against published manuals to verify load windows for their specific components and firearms.