357 Sig Brass Casings
Load your own .357 SIG ammunition with our brass to save big on your shooting costs. For best results, keep a close eye on your headspacing and setback, as these are often sore points for reloaders of this particular cartridge.
You'll want some small pistol primers to reload the .357 SIG.
Starline, Jagemann, and Top Brass all make or recondition brass for the .357 SIG.
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Starline 357 Sig New Unprimed Brass Casings - 100 Casings
$27.85Manufacturer SKU 357S This is not loaded ammunition. For the love of all that is holy, do not buy this 100-count bag of new, unprimed 357 Sig brass cases if you aren’t a handloader. You won’t just be wasting your money. You’ll also be depriving a handloader from practicing their art! These cases take small pistol primers.
Everyone knows that the 357 Sig cartridge was developed by necking down a 40 S&W case. They teach that in elementary school, for crying out loud. But if you think that means you can make your own 357 Sig cases by tampering with 40 S&W brass, don’t. A .40 cal shell is at least 0.009” too short for the job, and the loss in neck torsion could have disastrous consequences for your pistol.
What you ought to do is invest in Starline’s high-quality American-made component cases. These exquisitely standardized beauties are strong enough to be handloaded several times, and their uniform walls and precision cut extraction grooves ensure the smooth, reliable operation which make range training rewarding and self-defense practical.
OAL: 0.856–0.862". And just in case you aren’t sure: these cases have nothing to do with 357 Magnum.
