PMA Tool

30cal. Expander Mandrel (.307")

(8 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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8 Reviews

  • 5

    Posted by Scott W on 3rd Nov 2022

    Works great. Does just what it's supposed to do.

  • 5
    Good Mandrel, very smooth

    Posted by Richard Stephenson on 8th Nov 2021

    Great quality

  • 5
    30 cal mandrel

    Posted by Roger on 5th Jul 2021

    Well made precision mandrel. Can't wait to see if it tightens my groups.

  • 5
    The perfect Mandrel

    Posted by Michael Ouimette on 27th Jun 2021

    I've been hand loading over 40 years and I must say that this Mandrel is one of the finest additions to my press in years! Amazing quality, runs smoothly, very slick and sizes to perfection! I will be purchasing many more for all of my rifle calibers.

  • 5
    30CAL Expander Mandrel

    Posted by Dennis on 30th May 2021

    Great tool for reaching down into 30 BR cases and smoothing the DONUT area, Built long enough to get the job done, I LIKE IT !!!

  • 5
    30 cal expander mandrel

    Posted by Doug McFarling on 1st Feb 2021

    Well designed tool, works wonders for proper neck tension and concentricity. Please machine some mandrel in half thousands, ie .3065 etc. Great service! Thank you

  • 5
    30cal. Expander Mandrel

    Posted by Ted on 30th Dec 2020

    Used with the expander die body to straighten up some new Lapua cases that were deformed during shipping. The mandrel worked great to bring the cases back to proper size.

  • 5
    Best way I know to attain even neck tension

    Posted by Don Dory on 26th Dec 2017

    The carbide expander gently moves the neck to roughly 2 thousands under 308 diameter. Unless your necks are exactly even then even neck bushings don't provide even neck tension. Getting SD below 4 feels really good after all the case prep work.

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