Expander Die Body with Lock Ring

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Frequently bought together:


Expanding the case neck is an important step in the neck turning process, but many reloaders are finding case neck expanding equally important even if not neck turning. Running new brass over an expanding mandrel as a part of your case prep routine is always a good idea. This step irons out any dings, prepares the case mouth for deburring and uniforms neck tension.

Our Expander Die Body is as simple as they come. Drop the Expander Mandrel in the top, secure it with a set screw and you're ready to go. The set screw in the top allows the user to choose to free-float the mandrel or to lock it tightly in place.
Utilizes 3/8" shank expander mandrels from PMA Tool, 21st Century Shooting and Sinclair International.
Includes a ReddingTM  Lock Ring.
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12 Reviews

  • 5
    Expander die

    Posted by Mike Schwartzman on 7th Jan 2021

    Great quality. Machine work is excellent and quality of the metal is excellent. My Sinclair mandrels fit perfectly

  • 5
    excellent quality Die body

    Posted by Mark Palmquist on 8th May 2020

    Well machined inside and out. I had one when I was running single stage press now that I am running a turret press with multiple heads/calibers I have one for each caliber (just because I am too lazy to swap Die and mandrels between heads). Works perfectly to size for reloading or turning necks. I get more concentric necks pushing the mandrel down into the neck vs pulling the standard expander out so I removed the expanders in all my sizing dies.

  • 5
    Excellent expander die

    Posted by S. Sligh on 22nd Jul 2019

    This die worked great. With the 6mm to 30 cal neck expander installed it made fast accurate work of expanding 6mm dasher to 30 dasher cases. Excellent product and wonderful customer service.

  • 5
    Works like a champ!

    Posted by Jerry L Turner on 17th Jun 2019

    Fixed my problem! Great tool.

  • 5
    just plain works

    Posted by Jim on 11th Oct 2018

    Not much to say here, works as designed, no fuss no muss!

  • 5
    Best die out there for expander mandrel

    Posted by Mark on 21st Dec 2017

    Best die out there for expander mandrel

  • 5
    Great Tool

    Posted by Clay Tyer on 2nd May 2017

    Opted for carbide version but this tool looks like i is capable to do the job!

  • 5
    Used to resize neck of new Lapua 6mm BR Brass before loading

    Posted by John on 20th Feb 2017

    Works as advertised. Holds precision mandrels also available from PMA Tool and purchased. Accurate and true mandrel.

  • 4
    Expander Die body w/locking ring

    Posted by Bill M on 10th May 2016

    This is my first experience with an expander die body. With the appropriate size mandrel, it is easy to expand neck of rifle cases to facilitate neck turning. No other product to compare to or could have given 5 stars.

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