Mandrels

padom

SuperMod
Staff member
Mar 13, 2013
8,517
3,224
219
Southeastern, Pennsylvania
Are they all TIN? I'm only seeing one on their website and it makes no mention of TIN...
No they have TiN and Steel


Scroll down, the entire list of TiN are below.the Steel. The Turning arbors are sized to give .002 neck tension. I squeeze down .004 under final neck diameter with either a bushing or honed Forster FL sizing die then open up .002 with TiN turning mandrel with leaves me with .002 neck tension. The expander mandrels will leave you with .001 neck tension.
 
  • Like
Reactions: shoot 51

spife7980

Luchador
Belligerents
Feb 10, 2017
6,875
4,398
119
Central TX
I think it is easy to get confused with the 21st Century parts between TiN and Steel.

Their TiN expanders are only designed to match their neck turn arbors. The sets that are meant to control neck tension are not TiN.

Here are the sets for controlling neck tension.
http://www.xxicsi.com/expander-mandrels.html

Here are the ones to get to the right diameter to turn.
http://www.xxicsi.com/arbors-and-mandrels.html
Expander mandrels are .001 under bullet diameter. Turning arbors are .002 under bullet diameter. That’s in either material, stainless or tin. And for all other manufactures as well really.

The custom .0005 increment diameter option just allows you to specify in even finer increments.
 

milanuk

F'ing nuke
Belligerents
Mar 23, 2002
1,838
244
169
46
Wenatchee WA
Expander mandrels are .001 under bullet diameter. Turning arbors are .002 under bullet diameter. That’s in either material, stainless or tin. And for all other manufactures as well really.
Pretty sure my K&M mandrels for .30 cal are .307 and .308, not .306 and .307. And no, they weren't custom ordered.

That's why I always hated neck turning brass - I had to expand it, turn it, and then resize it, or else it didn't have enough grip to hold the bullet securely.

It's also why for the longest time I could never understand why other people were raving about expanding with a mandrel after F/L sizing their cases.

Once I finally twigged to the fact that Sinclair (and the rest of the industry since then) used a more or less standardized sizing scheme that was slightly different than what I was used to, it all made a lot more sense.
 

spife7980

Luchador
Belligerents
Feb 10, 2017
6,875
4,398
119
Central TX
Pretty sure my K&M mandrels for .30 cal are .307 and .308, not .306 and .307. And no, they weren't custom ordered.

That's why I always hated neck turning brass - I had to expand it, turn it, and then resize it, or else it didn't have enough grip to hold the bullet securely.

It's also why for the longest time I could never understand why other people were raving about expanding with a mandrel after F/L sizing their cases.

Once I finally twigged to the fact that Sinclair (and the rest of the industry since then) used a more or less standardized sizing scheme that was slightly different than what I was used to, it all made a lot more sense.
I added that really in there because I knew that there was gonna one out there who had to be different. And of course it’s k&m :ROFLMAO: