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Old 04-25-2004, 04:21 PM
REDTIP17

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Question Need some Fire Forming information



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Need some help here. I want to fire form some .222 Rem Mag brass to Ruger .204, Neck sizing is not problem BUT The whole shoulder of the .222 Rem Mag needs to move foward about .062 to .090" and the 204 has a little steeper shoulder.

The overall case length of both are the same. The 204 has a little more case capacity than the 222RM but the 204 was developed from the .222 rem mag case.

Questions: Can I safely fire form this much distance and should I load the round with a low velocity load to do this. Also, should I anneal the case neck & shoulder before fireforming. 95% of the brass is new unfired .222 REM MAG brass Bill

Last edited by REDTIP17; 04-25-2004 at 04:39 PM.
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Old 04-25-2004, 06:01 PM
Si6

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Bill

Ya got me on that one??? never did any of that fire formin stuff
shoot that question to xxring he might know about it
pm me if you need his phone#

Tony
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Old 04-25-2004, 08:48 PM
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cmjr
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I would think that I you were leary of shooting a loaded round you could try the Cream of Wheat method. You also might try anealing the neck first. I fireformed a 25-35 to 25-35 Ackley improved, an almost 25% increase in powder. This was the most radical fire forming I've ever done with moving the sloping shoulder forward about 1/4" and blowing it out to 40*. The new brass would split at the shoulder until I anealed it first. I used 8grs of unique, case full of cream of wheat, stuffed toilet paper in to hold it.
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Old 04-25-2004, 10:40 PM
Geezer

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Quote:
Originally Posted by REDTIP17
Need some help here. I want to fire form some .222 Rem Mag brass to Ruger .204, Neck sizing is not problem BUT The whole shoulder of the .222 Rem Mag needs to move foward about .062 to .090" and the 204 has a little steeper shoulder.

The overall case length of both are the same. The 204 has a little more case capacity than the 222RM but the 204 was developed from the .222 rem mag case.

Questions: Can I safely fire form this much distance and should I load the round with a low velocity load to do this. Also, should I anneal the case neck & shoulder before fireforming. 95% of the brass is new unfired .222 REM MAG brass Bill
Bill,
In effect, you are forming a new shoulder on the neck, so neck-size only far enough to get a good, hard "crush-fit" in your rifle. Might want to remove the firing pin to give a better "feel" when you set-up your die.

Too light a load will let the case move forward in the chamber thus increasing the headspace, something you don't really want, and that new shoulder is only about .020-.025" larger than the neck. Mighty small. You might also consider seating the bullet well into the lands in a further effort to keep the case from moving forward. I'd try a starting load from the manual if it will all fit in the unformed case.
As for annealing, I'd skip it if I could, but you may have to do it if you get too many splits. This is one of those "won't know 'til you try it situations".
Rob
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