Making 8x57 from 30-06

[mrrch]

Just a quick touch to the sander, not removing much. Blurs the head stamp enough and used for light plinkers only,primers sit flush still.

[Texas by God]

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[Texas by God]

I ended up making my own trim die from an old full-length sizing 8mm die. I annealed it and then cut it to length. After I polish it, I will reheat treat it. I have lots of Federal 25-06 & .270 to convert for CB use. No worries about headstamps that way.

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[EDG]

FL dies are case hardened low carbon steel so they do not have enough carbon on the cut off surface to be heat treated.

I ended up making my own trim die from an old full-length sizing 8mm die. I annealed it and then cut it to length. After I polish it, I will reheat treat it. I have lots of Federal 25-06 & .270 to convert for CB use. No worries about headstamps that way.

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[HangFireW8]

FL dies are case hardened low carbon steel so they do not have enough carbon on the cut off surface to be heat treated.

So carburize it.

[EDG]

Why take the long way? There is nothing to prove by all that work.
Buy a trim die for $20 off ebay.
If you are hell bent on doing it yourself just drop a hardened washer over the case neck to protect the top of the die.
It is even faster to use a Wilson case trimmer case holder and part the case off in a lathe.

So carburize it.

[HangFireW8]

Carburizing is not hard or expensive. I think he has already cut off the die. He obviously likes to make his own tools. Or remake them.

Think like a handy retired person with fixed income but lots of tools. Then it will make sense.

[EDG]

Why bother?
I have done that very thing 40 years ago. It is not worth the trouble.
Try thinking like a real tool maker.

Carburizing is not hard or expensive. I think he has already cut off the die. He obviously likes to make his own tools. Or remake them.

Think like a handy retired person with fixed income but lots of tools.











Then it will make sense.

[Texas by God]

Why bother?
I have done that very thing 40 years ago. It is not worth the trouble.
Try thinking like a real tool maker.

EDG- thanks for your input. I'll do what I want anyway as always. It's no bother.

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[lar45]

I've got a 9.3x57 Mauser and ordered some PPC 8x57 brass for it. I use that for all of my jacketed loads, but I wanted to try converting some 30-06 cases to use for cast.
I started with some once fired Rem cases and just used the lyman case trimmer to cut them down to 57mm + a little.


Next I lubed them and ran through the 9.3x57 sizer die and deburred the case mouth. A single pass through the sizer and they came out looking great.


I measured the necks and they were .015" at the base of the neck, so they needed turning.
I didn't have a 9.3 mandrel for the Hornady neck turner, so I opened the necks up with a 375 expander button.


Then turned the necks to get .012" wall thickness.


After turning the necks I ran them back through the 9x3.57 sizer die and did a final trim to get the correct lenth.
With all of the sizing, I annealed the necks.

[cosmoline one]

I just cut to size(I marked on harbor freight mini saw), lube by spray, run them slow & steady through a FL die, then trim & prep as you would
any other case. I dont anneal & I get many reloads in different 98 mausers.
(I used to use a redding trim die before the mini saw, but saw is faster& no issues)

[Minerat]

I am using some odd 270 size brass. The expander is out of the die. Have tried expanding necks to 7mm before sizing in 8mm die (RCBS FL), bent the necks. Tried trimming then expanding to 30 cal, split the case. So what's the trick to go from .270 to .323. Oh, tried sizing, trimming and then using universal expander and split the neck.

Now as Paul Harvey says, the rest of th story. Some fool converted these 3006 cases to 270. I picked them up cheap at a garage sale and did not catch it till today when I started counting out 50 to convert to 8x57. Probably more then once fired so may try annealing next then... How do I get there?

[EDG]

If you have any junk cases or .30-06 berdans use them for process development so you do not scrap good brass.

Try expanding with a long tapered expander. You may have to make or modify an existing expander. Redding makes those tapered buttons or you can grind an existing button.
Open up the neck to .30 cal from .270.
Then open to 8mm.

Your brass may need annealing of the necks or it may need 2 or 3 expander steps. You can determine what is necessary by experimentation.

I am using some odd 270 size brass. The expander is out of the die. Have tried expanding necks to 7mm before sizing in 8mm die (RCBS FL), bent the necks. Tried trimming then expanding to 30 cal, split the case. So what's the trick to go from .270 to .323. Oh, tried sizing, trimming and then using universal expander and split the neck.

Now as Paul Harvey says, the rest of th story. Some fool converted these 3006 cases to 270. I picked them up cheap at a garage sale and did not catch it till today when I started counting out 50 to convert to 8x57. Probably more then once fired so may try annealing next then... How do I get there?

Xu

[gpidaho]

I have found that the neck expansion die intended for use with the Sinclair neck turning tool to work very well when making the conversion of 30-06 or 270 to 8mm. The expansion die body and various mandrels are available separately. Gp

[Pressman]

Comparing the original post, there's a spam link.
If it is here, it may be all over the board.

[HangFireW8]

I don't see any kind of link in the original post of this thread.

[Grmps]

I tried regular reloading dies to resize the cases at first then went with the RCBS TRIM 8MMX57 MAUSER DIE -- much better
I wasn't a big fan of cutting with/on the die so I ended up using a small tubing cutter. I marked a few cases and saw where I needed to position the tubing cutter so I only had a couple thou to take off on my case trimmer.

IF your splitting necks try annealing before sizing, so far I haven't split any necks. (knock on wood)

I only used military cases without any calibers marked on them to help eliminate any possible confusion

[Texas by God]

Not a good pic but here's my results. I used 25-06, .270, & 30-06 brass. I used a trim die made from a cutoff fl die at first to move the shoulder back. Later I switched to a mini chop saw(Yes!) After cutoff, I annealed them then took the 25 thru a .270 die, then the .270s thru the 30-06 die, then All thru the 8mm CH die. This has an abrupt expander so a bit of quick muscle was needed. I used Hornady sizing wax throughout.
217grNOE326471F / 30.2(2.2cc) H4895
I lost one case out of 30. The neck split on a Federal 25-06. Thanks to you all for your help.
Thomas

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[Hamish]

I know I'm late to the party, but,,,,,,,

I have two jigs made by Von Zep for 300 BLK and 7,92x57, that are made to mount to the Harbor Freight Mini Chop Saw that are the ONLY way I would think about doing it after cutting a couple of hundred down by hand with the case trimmer.

With .270 I ran them up as far as they would go in a Lee FL die sans expander, ran them through the chop saw, then finish FL'd them. I do not remember losing a single case. If you set up the HF saw well, there is minimal touch up in the case trimmer.

I just peeked at VonZep's store, not sure if the 8mm model is in stock or not, but I HIGHLY recommend their jigs if doing more than a handful,,,,,

https://www.zepreloading.com/store/c..._Products.html

https://www.zepreloading.com/video-o...in-action.html

(skip to the 2:00 mark)
https://youtu.be/6q-N4nai6_4

[Minerat]

I finally settled on, annealing cases, flair case mouths, run thru 7mm expander, the 308 expander and finally the 8mm and rough trim to length. Once I annealed the cases they stopped splitting. Thanks all for your suggestions.