The L.E. Wilson Die with Expanding Mandrel in 25 caliber, .256 inch (L.E. Wilson part no. EXP-25MD), preps new or once-damaged brass for optimal bullet seating by expanding the case neck to just slightly under bullet diameter. That controlled expansion delivers a consistent neck diameter, uniform neck tension, and repeatable seating depth across a batch. It’s especially useful for new brass that arrives dented from bulk shipping or that needs prepping ahead of its first firing. Built from stainless steel for long-lasting durability, it ships with one mandrel installed, and additional mandrels for other calibers are sold separately.

Key Specifications

• Expands the case neck to just under bullet diameter for consistent tension.
• Ships with one mandrel included; additional mandrels sold separately.
• Built from stainless steel for long-lasting durability.
• Fits a standard 7/8-14 reloading press.
• Features a cut-out for a clear view while aligning the case and setting depth.
• Especially useful for new or shipping-damaged brass ahead of first firing.

Frequently Asked Questions

Does this die expand the neck to full bullet diameter? No, it only expands the neck to slightly under bullet diameter, for controlled, consistent neck tension.

Can I use this die for other calibers? The die accepts interchangeable mandrels, sold separately, for other calibers.

Buy the L.E. Wilson Expanding Mandrel Die, 25 Caliber .256 Inch

New brass fresh out of the box isn’t always ready to load straight away, and this mandrel die is built specifically to prep it for consistent, repeatable seating. Order this L.E. Wilson die from our reloading dies selection and we’ll ship it fast from our Lubbock, Texas gun shop.