PMA Tool

24cal Carbide Expanding Mandrel 6MM

(5 reviews) Write a Review


 Over the past several months we have received many requests to make expanding mandrels from carbide. Due to this popular demand we are now offering expanding mandrels from carbide. Carbide reduces galling and scratching both on the inside of the case neck and the mandrel itself. We still recommend the use of lubricant when expanding case necks to make the operation easier.

These mandrels are ground from a 3/8” solid carbide blank and sized properly to expand case necks, preparing them for neck turning. They can also be used to iron out dings and flat spots on new brass not destined to be neck turned, preparing them for loading and bullet seating.

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5 Reviews

  • 5
    Very smooth

    Posted by Jim on 5th Nov 2021

    Fixed my inconsistent bullet seating

  • 5
    24cal/6mm Carbide Expanding Mandrel

    Posted by Old-Bob on 11th Oct 2021

    Helped fix case neck tension issues I had with my 6mm ARC reloads using 6.5 Grendel brass resized to 6mm ARC.

  • 5
    Carbide Mandrels

    Posted by D E Weathers on 20th Jul 2021

    You should always use lubrication even on carbide mandrels. Always use the same viscosity lube. Even lube can make a difference.

  • 5

    Posted by Jeffrey Behr on 29th Jan 2021

    I've been using the neck-expander buttons of my full-length-sizer dies for decades.. I just discovered this carbide mandrel and holder die and I think I'm in heaven.. It's now MUCH easier on my damaged shoulder to expand the necks, and I feel the process is more precise with this holder-and-mandrel system.. I like my first so much I ordered a second for my second-most-used set of dies.

  • 4
    Still requires lube for new Lapua 6mm BR cases

    Posted by JA McDonald on 20th Feb 2017

    Used for above purpose with PMA Tool mandrel holder. Well machined and accurate. However, I found it sticky and requiring lube inside case neck using new Lapua brass. Perhaps this is true of all carbide dies, although for pistol brass it's commonly stated that they avoid the need for lubrication.

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