22-243 Middlestead Case Making

wirelessguy

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Joined
Jun 30, 2009
Messages
3
I have bit the bullet and am having my M700 rebarreled to 22-243 Middlestead.

However, I have never had to do fireforming, etc. Can anybody explain the process for this cartridge and what I will need in terms of dies, etc?
 

Varmint Hunter

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Joined
Dec 26, 2001
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3,223
Location
Long Island, New York
I have bit the bullet and am having my M700 rebarreled to 22-243 Middlestead.
However, I have never had to do fireforming, etc. Can anybody explain the process for this cartridge and what I will need in terms of dies, etc?
Do yourself a favor and just chamber to 22-243 (plain) no fireforming of any kind. Just take a Lapua 243 case and neck it down and you're done. I really don't see the advantage of the Middlestead. I've owned a 22-243AI and the non-AI version.

Fireforming wastes valuable (and limited) case life in the cartridge.

You didn't mention what barrel twist you were getting but I'd suggest nothing slower than an 8 twist. You really can't get the full potential out of this cartridge without using one of the heavy, high BC bullets which require a fast twist barrel. You could shoot 52-55gr bullets out of the fast twist if you wanted to but you can't shoot the heavy bullets out of a slow twist.
 

wirelessguy

New Member
Joined
Jun 30, 2009
Messages
3
Thanks for opinions. I have agonizing about doing that. I've sent a e-mail to PacNor to just chamber for the regular 22-243. I doubt they have gotten to my barrel yet.
 

B23

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Joined
Oct 30, 2008
Messages
1,453
Location
Spokane, Wa.
As popular as this round has become does anyone know of anyone that has a fire forming rig setup to just form brass?

I would think someone out there has this setup and would be interested in selling some preformed brass.
 

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