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Old November 22, 2012, 12:25 AM   #43
Junior Member
Join Date: November 11, 2005
Location: Perkiomenville, Pa
Posts: 13
Some published info on reloading .40 Smith brass to .357 Sig:

"The .357 SIG headspace is determined by the shoulder, not the case mouth, just like the .400 Cor-Bon and virtually every other rimless or rebated rim bottle neck cartridge. 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."


Last edited by homefront; November 22, 2012 at 12:37 AM.
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