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View Poll Results: can you use .40S&W brass to make .357Sig brass
don't even think about it, you'll blow yourself up 1 9.09%
I wouldn't 4 36.36%
I'd give it a try 1 9.09%
if it doessn't work, you can still type with your nose to warn us not to try 5 45.45%
Voters: 11. You may not vote on this poll

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  #1  
Old 11-13-2010, 11:30 PM
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Exclamation Turning .40S&W into .357 Sig brass?

Can I do it? I ran a few through the sizing die and it looks good. I got the Idea because you can make 400 cor-bon brass from .45ACP just by running it through the sizing die. the stuff I made did end up 15 thousandths shorter than the factory brass I am reloading
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Old 11-14-2010, 12:17 AM
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i dont know, but this thread makes me want a .400 corbon barrel for my usp. i didnt know it was that simple!!! just when i thought i was done buying gun stuff for awhile....
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Old 11-14-2010, 1:11 AM
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for the 400 corbon, the conversion kit and dies are going to cost you more than the barrel.. if .40 bullets are 1 cent less than .45 bullets, it will only take you 20,000 rounds to break even
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Old 11-14-2010, 8:54 AM
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Appartently there is a whole book on wildcatting rounds. Like making .300 whisper cases from a .223.

http://www.realguns.com/archives/001.htm

Probably* why people have frequently and successfully used necked down .40 S&W brass to make* .357 SIG cases, even though the .40 S&W is over .020" shorter
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Old 11-14-2010, 9:53 AM
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You can, and it will end up shorter. I've done it, but the short neck does not offer much to work with in terms of bullet retention.
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Old 11-14-2010, 10:07 AM
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thank you for the good info...especially the link. I'm a cheep basterd so.. I will probably give it a go. I am probably going to have to get jacked FN bullets, I don't think lead is going to work out all that well because I am seeing some really HOT loads for this round... upwards of twice what I am loading my 185 grain .45ACP rounds with (4.1 bullseye)
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