PMA Tool

28cal. Expander Mandrel 7mm (.283")

(4 reviews) Write a Review



Our Neck Expanding Mandrels are designed to fit both the 21st Century Shooting and Sinclair Expander Dies. Our mandrels are longer than other expanding mandrels and feature a special dual taper which expands both on the up and down stroke of the press to more uniformly expand and straighten case necks.


Expanding Mandrels are available in the following calibers:

17, 20, 22, 6mm, 25, 6.5mm, 270, 7mm, 30 and 338


Also available in our Neck-Up mandrels for 22cal – 6mm and 6mm – 30cal. Perfect for necking 220 Russian up to 6mm for PPC and 6BR up to 30 caliber for 30BR.





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4 Reviews

  • 5
    Neck Expander

    Posted by Mike Bond on 11th Dec 2020

    Great product. Works smooth and easily expand necks out to 28 cal. I recommend it.

  • 5
    7mm expander

    Posted by Robby Miles on 24th Apr 2020

    Great product with tight tolerances, made the job easy & my brass consistent.

  • 5
    Great tool for my need!

    Posted by Jerry L Turner on 17th Jun 2019

    I was having trouble finding 7mm BR brass, so with this tool I changed 6mm BR brass to 7mm. Glad I bought it.

  • 5

    Posted by Unknown on 25th Oct 2017

    Works great

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