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Post by wsl49er on May 22, 2010 14:18:07 GMT -5
Someone in the Gunsmithing thread suggested using a modified 223 case instead of a modified 357 Maximum case. Initially it looks possible until you attempt to seat a bullet. What happens is the seating die requires the diameter of the 357 Max case in order for the shell to be centered properly for the bullet to seat without pushing out the side of the brass. Since the sizer only sizes the forward part on the 223, the mid range dimension of the 223 shell is unaffected and remains a smaller dimension than necessary for proper positioning (center). There's a substantial difference between the two cases in the mid range diameter and what occurs is the bullet seats to the weakest point in the brass case. Basically the 357 is necked down, even if only slightly while the 223 is made way larger. There's no way to safely fire this off center, weakened cartridge for the concept of "fire forming" to apply. I would strongly urge anyone to NOT try and fire form or use the 223 brass when 357 Maximum brass functions as well as it does.
I purchase the appropriate shell holder and made a better than good effort to make this work. It is undoable in any standard format.
IMHO
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Post by texashoosier on Jun 7, 2010 9:52:14 GMT -5
Let's be correct here. The link I posted www.reloadbench.com/cartridges/w338223s.html is for using the .223 case in a rebarreled Winchester 1907; not as a substitute for the .351SL (or modified .357 Maximum) case in a stock rifle.
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Post by gastrap on Jun 8, 2012 13:11:51 GMT -5
Sorry to disagree but if you go up to the winchester 1907 thread, adventures in 351 WSL brass you will see my reply to CRANK. I tried it and it worked real well and accuracy was as good as factory ammo ever was. The off center front end didn't make a difference. I then reloaded the fire formed cases and they looked as good as factory. The added benefit is you don't go nuts if you loose one.
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