30 cal expander mandrels

[AckleymanII]

I want to purchase some incremental dia. expander mandrels. Who makes good sets?

thanks

Keith

 

[Mulligan]

Caliber Specific Expander Mandrel Kits (Caliber Specific Expander Mandrel: 30Cal. Kit)

21stcenturyinnovation.com

CW

 

[TrapperBR549]

Will the 21'st century mandrels work with a lyman m die or do I have to buy 21'st expander die?

 

[Mulligan]

Will the 21'st century mandrels work with a lyman m die or do I have to buy 21'st expander die?

Not sure, they do work with the Sinclair die
CW

 

[Straightshooter1]

I want to purchase some incremental dia. expander mandrels. Who makes good sets?

thanks

Keith

Just how good do you want?

You might consider this:

https://portersprecisionproducts.com/expander-mandrel-die/

 

[Triple BB]

I use 21st Century. Sinclair has a selection of Carbide mandrels if you want to spend some cash...

 

[L.Sherm]

Just how good do you want?

You might consider this:

https://portersprecisionproducts.com/expander-mandrel-die/

+1

 

[3Sigma]

I use K and M.

Expand Mandrels for Bullet/Neck Tension Builder

Expand Mandrels for Bullet Tension expand the case neck so the brass will spring back to the correct size needed for seating bullets.

kmshooting.com

You can custom order, but you'll need to call for the mandrel OD specs, they sell by neck tension (?)

FWIW, my .308 mandrel is .306.

Or, use pin gauges.

 

[Ned Ludd]

I have purchased several of the 21st Century mandrels in a wide variety of sizes for .223 Rem and .308 Win cases over the years. However, many of them see little use. For example, in .30 cal, the 0.3065" mandrel will give you very close to .002" neck tension (interference fit) in Lapua Palma brass sized first with a 0.305 bushing. A 0.3070" mandrel will give ~.0015 neck tension. Those two get by far the most use of my .30 cal mandrels, although I occasionally will use a 0.3110" mandrel to remove flat spots on fired necks caused by a strong ejector prior to fully prepping the cases. If you don't want to spend the money on an entire set that may contain several sizes you might not use very often, I'd start with some combination from within the three diameters I mentioned above (.3065", .3070", .3010").

FWIW - In addition to the 21st Century die, their mandrels will also fit in the Sinclair Gen II Expander die:

All SINCLAIR INTERNATIONAL Products for Sale Online - 236 Products

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www.sinclairintl.com

 

[ranger0787]

Call or contact Steve Jennings at SJR Enterprises. I have 4 sets of his mandrels and dies in .005" increments. They work great! steve@sjr-enterprises.com

 

[DocDoc]

ranger, did you miss a zero? .0005?

 

[ranger0787]

Oops. Yes, I did. Thanks.