K&M Expander Mandrel Powerstroke Bullet Tension

There are no Exchanges or Refunds on this item as manufacturer deems these non exchangeable.

KM Custom Grind Machined Expander Mandrels – for controlling case neck tension

Unlike the other calibres in these KM expanders these are actually list as the real or actual size they are. So that you can calculate from there how much springback may occur

These are special ground expander mandrels to be used for obtaining more precise bullet seating tension.
These are custom undersize expanders to help reloaders control neck tension better. Particularly when you are not doing outside neck turning of brass which uniforms wall thickness.
These custom expanders are available in 1/2 thousandths of an inch increments of BULLET TENSION being the size under (or less than) the calibre size.

Holder and press adapter sold separately

Shipping & Returns

Shipping Costs are calculated at the checkout, based on your postcode and the weight of all combined items.

Due to Australia Post limitations, the maximum weight for each order is 20kg. Orders over this weight limit will have to be placed in two separate orders. For heavy items please contact us directly to discuss shipping.

Expensive and/or fragile items will only be shipped via registered post with adequate insurance.

Due to Australian regulations we are restricted to shipping all projectiles to customers located in Australia only.

Dangerous goods including powders, solvents and primers cannot be shipped and MUST be collected from the QStore.

Click here to view our full policy.