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  • Home
  • About Us
  • Everything you need to know about reloading
    Start Shopping
      Reloading Dies
      Reloading Presses & Accessories
      Reloading Tools
      Reloading Components
      Powder Handling
      Measuring Tools
      Case Cleaning & Prep
      Bullet Casting
      Shotshell Reloading
  • My Account
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EXPANDING MANDREL DIES - 33 CALIBER (0.337) DIE W/EXPANDING MANDREL

EXPANDING MANDREL DIES – 33 CALIBER (0.337) DIE W/EXPANDING MANDREL

Specifications

  • Diameter (in): 0.337
  • Die Style: Expander Die
The Wilson Expanding Mandrel Sizing Die. These dies are designed to be used on NEW brass cases to prepare the case for the seating operation.  Over the past few years we have seen a greater need to run new brass cases over an expanding mandrel to properly prepare them for their first firing.  New brass cases are often damaged when shipped in bulk, this die will give you a consistent neck diameter on your cases.  With correct neck tension you can expect a more consistent seating depth.
 
Includes one mandrel.
 
Additional mandrels sold separately.
  • Cut out in die provides an easy view for making sure case aligns and setting up depth
  • Interchangeable Mandrels depending on caliber
  • Standard 7/8ths Reloading Press
  • Die ONLY expands neck to slightly under bullet diameter 
  • Stainless Parts for a Long Lasting Finish
  • Durable and Accurate
L.E. Wilson manufactured lock nut – thickness is .225" from inside to outermost edge .270" for height and 1.250" total width OD
 
Description

Original price was: $77.44.Current price is: $58.67.

The Wilson Expanding Mandrel Sizing Die. These dies are designed to be used on NEW brass cases to prepare the case for the seating operation.  Over the past few years we have seen a greater need to run new brass cases over an expanding mandrel to properly prepare them for their first firing.  New brass cases are often damaged when shipped in bulk, this die will give you a consistent neck diameter on your cases.  With correct neck tension you can expect a more consistent seating depth.
 
Includes one mandrel.
 
Additional mandrels sold separately.
  • Cut out in die provides an easy view for making sure case aligns and setting up depth
  • Interchangeable Mandrels depending on caliber
  • Standard 7/8ths Reloading Press
  • Die ONLY expands neck to slightly under bullet diameter 
  • Stainless Parts for a Long Lasting Finish
  • Durable and Accurate
L.E. Wilson manufactured lock nut – thickness is .225" from inside to outermost edge .270" for height and 1.250" total width OD
 

4 in stock

SKU 749018896 Category

Description

The Wilson Expanding Mandrel Sizing Die. These dies are designed to be used on NEW brass cases to prepare the case for the seating operation.  Over the past few years we have seen a greater need to run new brass cases over an expanding mandrel to properly prepare them for their first firing.  New brass cases are often damaged when shipped in bulk, this die will give you a consistent neck diameter on your cases.  With correct neck tension you can expect a more consistent seating depth.
 
Includes one mandrel.
 
Additional mandrels sold separately.
  • Cut out in die provides an easy view for making sure case aligns and setting up depth
  • Interchangeable Mandrels depending on caliber
  • Standard 7/8ths Reloading Press
  • Die ONLY expands neck to slightly under bullet diameter 
  • Stainless Parts for a Long Lasting Finish
  • Durable and Accurate
L.E. Wilson manufactured lock nut – thickness is .225" from inside to outermost edge .270" for height and 1.250" total width OD
 

Additional information

Weight .49 lbs
Diameter (in)

0.337
Die Style

Expander Die

Frequently Asked Questions

Are these brass cases and reloading components factory-new or once-fired? +

We stock both premium factory-new components and high-quality once-fired brass. Please check the specific product listing title and description carefully; once-fired brass is fully inspected, but we always recommend resizing and inspecting prior to priming and powder charging.

Will this case trimmer gauge or die set work with my progressive press setup? +

Our standard reloading dies and case length trimmer accessories utilize industry-standard threads (typically 7/8"-14) compatible with major single-stage, turret, and progressive presses like RCBS, Hornady, Lee Precision, and Dillon. Caliber-specific trim gauges must match your exact brass caliber.

Do you enforce shipping restrictions on powder, primers, or live ammunition? +

Yes. Non-hazardous reloading equipment (dies, case length trimmers, gauges, and unprimed brass) ships via standard ground carriers with no extra fees. Any orders containing smokeless powders or primers will incur standard federal HazMat handling fees and cannot be shipped via air transportation.

How can I track my shipment to ensure delivery safety? +

Precision reloading gear is valuable, so all orders are shipped with tracking enabled. As soon as your package is dispatched from our inventory warehouse, a tracking number will be emailed to you. You can monitor your shipment directly on our Track Order page using your unique Order ID.

Can I return precision measuring tools or die components if they don’t fit? +

We accept returns on unused, unaltered tools, case preparation equipment, and unopened component boxes within 30 days of item delivery. Due to safety and strict quality control on the reloading bench, we absolutely cannot accept returns on opened packs of primers, smokeless powder, or processed brass casings.

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