Posted by denny mcdaniels on Aug 21, 2026 in Handgun Cartridge Reloading Info, Rifle Cartridge Reloading
Duck Creek Sporting Goods offers Redding form die sets for forming .22 Remington Jet and .256 Winchester Magnum brass from readily available .357 Magnum cases. These unique form die sets give handloaders a practical way to produce brass for two classic cartridges that can be difficult to supply with factory cases.
The .22 Remington Jet and .256 Winchester Magnum were both developed from the .357 Magnum case, with the .22 Jet necked down to .22 caliber and the .256 Winchester Magnum necked down to .25 caliber.
Make Hard Case-Forming Jobs Easier
Forming .357 Magnum brass into either cartridge can be a challenging process without the proper equipment. Redding’s multi-step forming dies gradually reduce the case neck and establish the correct case shape rather than attempting to force the parent case into its final dimensions in one operation. Redding specifically designs its form dies to change case shape in stages, reducing stress on the brass.
For the .22 Remington Jet, the Redding process uses Form Die #1, Form Die #2, a Form & Trim Die, and then the appropriate full-length sizing die. Redding’s instructions also emphasize checking finished case-neck dimensions to ensure adequate clearance in the chamber.
The .256 Winchester Magnum follows a similar multi-step process using Redding Form Die #1, Form Die #2, the .256 Form & Trim Die, and final full-length sizing.
Why Use .357 Magnum Brass?
One of the biggest advantages is the availability of the .357 Magnum parent case. Instead of relying exclusively on scarce or obsolete cartridge brass, reloaders can start with suitable .357 Magnum cases and form them into the desired cartridge. This makes case forming a practical option for shooters who want to keep classic .22 Jet or .256 Winchester Magnum firearms in use.
What can be a frustrating, time-consuming case-forming project becomes a much more manageable operation with the correct Redding forming equipment.
Unique Form Die Sets from Duck Creek Sporting Goods
Duck Creek Sporting Goods offers these Redding form die sets as a unique solution for handloaders working with the .22 Remington Jet and .256 Winchester Magnum. If you have been searching for a practical way to make brass for these older cartridges, starting with readily available .357 Magnum cases and using the proper Redding forming dies can make the process considerably easier.
For reloaders interested in obsolete cartridge reloading, case forming, .357 Magnum brass, .22 Remington Jet brass, and .256 Winchester Magnum brass, these Redding form die sets are a valuable addition to the reloading bench.
