Expander Mandrels

From $50.00

Expander Mandrels are ONLY compatible with Short Action Customs Modular Sizing Dies.

NOTE: If you are not currently using a SAC Expander Mandrel in your Modular Sizing die, you will likely need to purchase a compatible ER11 Collet.  Please see chart at bottom of page.

Expander Mandrel Size:
Collet:
NOTE: If you haven't purchased a compatible collet for your mandrel please see compatibility chart below
Categories: , Product ID: 24491

Description

Expander Mandrels

Precision Ground, Solid Carbide, Available in .0005” Increments

Our solid carbide expander mandrels are made to be used in any of our Modular sizing dies with the appropriate collet. Note that the appropriate collet is often “one size larger” than the mandrel, as the precision grinding process requires we start with a larger piece of material and bring it down to size; therefore, the top part of the mandrel, what the collet interacts with, is larger.

Our Expander Mandrel is unique because it expands the necks of your brass on the “down stroke” instead of the “up stroke” of your press. Furthermore, the precision ground expanding detail is high up in the die, slightly below the cartridge’s neck/shoulder detail. The benefit is that as the cartridge is pulled out of the die, the cartridge neck transitions from the neck bushing to the expander mandrel right away. This 1). ensures a seamless transfer of the cartridge neck from the Neck Sizing Bushing to the Expander Mandrel. 2). Expanding is more consistent because the brass starts off perfectly centered in the die and is immediately expanded as the brass is drawn out of the die body. This is ideal, where expanding on the “up stroke” puts all the stress and pressure on an unsupported case/neck causing runout.

ER11 Collet Compatibility

  • 22 CAL MANDRELS:  REQUIRE 6MM COLLETS

  • 6MM MANDRELS:  REQUIRE 1/4″ COLLETS

  • 25 CAL AND 6.5MM MANDRELS:  REQUIRE 7MM COLLETS

  • 7MM AND 30 CAL MANDRELS: REQUIRE 5/16″ COLLETS

Additional information

Weight2 oz
Dimensions4 × 3 × 1 in

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