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-   -   Turning .40S&W into .357 Sig brass? (

five.five-six 11-13-2010 11:30 PM

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

sevensix2x51 11-14-2010 12:17 AM

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....

five.five-six 11-14-2010 1:11 AM

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 :rofl2:

joelogic 11-14-2010 8:54 AM

Appartently there is a whole book on wildcatting rounds. Like making .300 whisper cases from a .223.

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

J-cat 11-14-2010 9:53 AM

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.

five.five-six 11-14-2010 10:07 AM

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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