Neck Turning Expand Mandrels and Accessories

(2 customer reviews)

From: $10.50

Properly expand your brass before neck turning.
Press Adapter required. Help me choose a press adapter to hold an expand mandrel for neck sizing.

Click here for Bullet Tension Expand Mandrels

  • Version 2 Press Adapters

    Help me choose a press adapter to hold an expand mandrel for neck sizing.

  • CASE ONLY, tools sold separately. 
    (New foam is compatible with v1 and v2 PowerStroke™ Press Adapters)

In stock


Expand Mandrel and Accessories | Get the best expand mandrels from K+M

Virgin/competition Brass isn’t quite ready to Neck Turn when you buy it. And the commercial die manufacturers have no set standards for the Expander button in their dies. Large variations from manufacturing to manufacturing and even within a given manufacturing makes it necessary to properly size the inside diameter before turning. Don’t be fooled by slick talk. The turning pilot cannot be used to correctly expand the case neck because of the elasticity of the brass; it will spring” back and be too tight for proper Neck Turning. The 7/8-14 Threaded Adapter fits your Normal Reloading press and the interchangeable Mandrels are sized to be the perfect companion to the K & M MICROADJUSTABLE Neck Turner. The EXPAND MANDREL will iron out (smooth) and slightly expand the case neck so the brass will spring back to the correct size needed to neck Turn your Pet Brass.


Don’t forget about purchasing a Press Adapter if you don’t already have one. Also the Window Riser is the most consistent way to go.

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2 reviews for Neck Turning Expand Mandrels and Accessories

  1. Charles Whitfill (verified owner)

    High level of quality.
    Exact specifications as always.
    Great service.
    Quick shipping

  2. rwintle1945 (verified owner)

    Some things never change. K&M is always my go to for neck tools. Quality & timely shipping.

    • Dave @ K&M (verified owner)

      Thanks Mr. Wintle for the kind works and for the repeat business!

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