SAC Decapping Expander Mandrels

$159.00

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EXPANDER MANDRELS ARE ONLY COMPATIBLE WITH SAC DIES.
NOTE: IF YOU ARE NOT CURRENTLY USING A SAC EXPANDER MANDREL IN YOUR DIE, YOU WILL NEED TO PURCHASE A 1/4″ ER11 COLLET.

 

PRECISION GROUND, CARBIDE,  AVAILABLE IN .001” INCREMENTS … WHAT’S NOT TO LOVE?

Our new Expander Mandrels easily install into the Precision Resizing Die, “The” Sizing Die, or by simply converting “The” Seating Die into an “Universal Expanding Die”. Simply install the appropriate ER11 collet into your die’s “Knurled ER Top Cap”, drop the Expander Mandrel in the top of the die and tighten it down, you’re ready to expand your necks in the same operation as sizing the body and necks.

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.

All of our Expander Mandrels are rough turned then through hardened, next they are precision OD Ground for the full length ensuring that all of the outside detail is concentric and ground in the same operation. Lastly, they are Black Nitrided to increase the surface hardness in the 70-80 HRC range.

6BRA SAC Sizing Die Assembly with Expander.jpg

WHAT IS NEEDED TO START USING THE SHORT ACTION CUSTOMS EXPANDER MANDRELS?

  • One of the Short Action Customs Precision Resizing Die, “The” Sizing Die, “The” Seating Die

  • Appropriate ER11 collet to hold the Expander Mandrel. *** Expander Mandrels typically use a different ER11 Collet than a Solid Decapping Pin***

  • Only ONE ER11 collet is needed for each caliber range. For example, you would only need to purchase one ER11 1/4” Collet in order to hold any 6mm Expander Mandrel

Collet-Chart-and-Expander-mandrel.png

SKU: N/A Category:

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 NEED TO PURCHASE A COMPATIBLE ER11 COLLET.  PLEASE SEE CHART IN BELOW

CAUTION!!!  DO NOT ORDER UNTIL YOU CONFIRM WHICH DECAPPING EXPANDING MANDREL WILL WORK WITH YOUR DIES.  IF WRONG MANDREL IS ORDERED, SAC WILL NOT REFUND SHIPPING AND CHARGE SHIPPING FOR CORRECT MANDREL.  PLEASE READ PRODUCT DESCRIPTION

PRECISION GROUND FROM SOLID CARBIDE.

AVAILABLE IN .001” INCREMENTS

OUR SOLID CARBIDE EXPANDER MANDRELS ARE MADE TO BE USED IN ANY OF OUR MODULAR SIZING DIES WITH THE APPROPRIATE COLLET.

Our Decapping expanding mandrels are unique because it expands the neck 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.

  • Ensures a seamless transfer of the cartridge neck from the Neck Sizing Bushing to the Expander Mandrel.
  • 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.

All of our Expander Mandrels are rough turned, next they are precision OD Ground for the full length ensuring that all of the outside detail is concentric and ground in the same operation.

PLEASE READ

Our decapping expanding mandrels will have 5 different lengths.  Short, GT Length, Medium, Medium Long, and Long.  The length mandrel depend on the Modular Sizing die you own.  The follow list provides you with the correct mandrel length for the Cartridge you are reloading for.  Additional cartridges will be added as the dies are made.

SHORT
  • Dasher
  • BRA
  • BR
  • ARC
SHORT MEDIUM
  • GT
MEDIUM
  • Creedmoor
  • X 47 Lapua
  • 223 Remington
  • PRC
  • PRC Type 2
  • SAUM
  • Winchester
MEDIUM LONG
  • 7 PRC
LONG
  • 300 PRC
IF YOU ORDER THE WRONG MANDREL YOU WILL BE RESPONSIBLE OF ANY FEES ASSOCIATED WITH THE EXCHANGE FOR THE CORRECT SIZE
IN ORDER TO PICK YOUR MANDREL SIZE YOU WILL WANT TO UNDERSTAND WHAT THE METALLURGICAL PROPERTIES OF YOUR BRASS ARE
  • HOW MUCH SPRING BACK THE BRASS CURRENTLY HAS IF MANDRELING
  • IF UNSURE HERE IS TYPICALLY WHAT WE SEE SPRING BACK WISE WITH THESE BRASS MANUFACTURERS.
  • LAPUA ANNEALED (.0005″)
  • LAPUA UNANNEALED (.001″)
  • ALL OTHER MANUFACTURERS ANNEALED (.001″)
  • ALL OTHER MANUFACTURERS UNANNEALED (.002″)
AGAIN, THE ABOVE NUMBERS ARE ESTIMATES WE HAVE SEEN WITH TESTING INTERNALLY IN THE SHOP.
Weight .1 kg
Dimensions 6 × 1 × 1 cm

Brand

Short Action Customs

At SAC we are never satisfied with the industry standard. Our business has been founded with the principal that everything must be challenged and improved upon. Techniques, tooling, fixtures and execution can all be refined to the point of perfection. With every service and detail we perform, we apply this philosophy. It is our pleasure to deliver exceptionally designed products and services on time with performance and satisfaction at the heart of everything we do. Thank you for choosing Short Action Customs, LLC

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