APW Expander Mandrel Set

(12 customer reviews)


If the item is out of stock, there will be a +/- 10 day lead time.

The APW Expander Mandrel effectively smooths and gently expands the case neck, ensuring consistent neck tension. This method has proven to be the most straightforward approach to significantly reduce Extreme Spread (ES) and Standard Deviation (SD) figures.

Commercial die manufacturers often lack standardized specifications for the expander ball in their dies. This variance necessitates proper inside diameter sizing before seating. We recommend the complete removal of the expander ball from your resizing dies.

Your final step before powder addition should be to expand your necks using the appropriate expander mandrel. When employing the mandrels, we advise using Imperial sizing lube sparingly, as a little goes a long way. We employ a single-stage press to expand the neck on the downstroke, followed by packing the brass, now “ready for primer and powder,” into our APW reloading trays.

The die body is compatible with your standard reloading press, and the interchangeable mandrels are precisely sized. The kit comprises mandrels for achieving 0.001 or 0.002 neck tension, along with a base to maintain organization when not in use.

The original model is the bigger body and the revamped skinny body is designed to work with the Co-Ax press. Please ask for skinny body if you have a Co-Ax press.

Secure this item by ordering now; it will be custom-made by our supplier according to your specifications.

Categories: , Tags: , ,


The complete set includes mandrels for the following calibers:

  • .224 Cal: 0.223, 0.222
  • .243 Cal (6mm): 0.242, 0.241
  • .264 Cal (6.5mm): 0.263, 0.262
  • .284 Cal (7mm): 0.283, 0.282
  • .30 Cal (308): 0.307, 0.306
  • .338 Cal: 0.337, 0.336


  • Lead Times

    Current lead times on out of stock sets is 12-15 working days.

Additional information

Weight 1.5 kg
Dimensions 17 × 13 × 11 cm

12 reviews for APW Expander Mandrel Set

5.0 Rating
1-5 of 12 reviews
  1. Great shipping. Great set of mandrels. Very well packaged.

  2. Excellent product, good price, rapid shipping

  3. Amazing product, couldn’t be any more easy to use or set up and does an awesome job!

  4. Hi thank you for the good service.

Add a review
You must be logged in to post a review Log In