No. The two cartridges are not interchangeable. The .357 Sig got its name because it was an attempt to replicate the performance of the .357 Magnum cartridge in a semi-auto pistol. This was done by taking a 9mm bullet, and placing it in a necked down .40 S&W casing, whereas the .357 Magnum is a much longer, and rimmed, cartridge, developed simply by lengthening the .38 Special.
Yes, but, not recommended.
No. However, .38 Special ammo CAN be safely fired in a .357 Magnum firearm. Both cartridges use a bullet that is .357 in diameter- but the .357 magnum is longer, and more powerful.
No.
It CAN be, but would have it checked by a competent pistol smith first.
NO!!!!!!!!!!!!!!!!! DO NOT TRY THIS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
No. They both use a different diameter bullet and the case is different. The .357 Sig case is a bottle-necked version of the .40 S&W case. The .357 mag is a longer version of the .38 Special.
.357 Magnum and .38 Special (to include +P and +P+ loadings).
That would be 38cal. ammo
Gun shop, gun show, old catalogs
No, do not, under any circumstances, attempt this.
.357 Sig and .357 Magnum are not even close. .357 Magnum is a rimmed, straight walled cartridge for use in revolvers. .357 Sig is a rimless, bottle necked cartridge used in semiautomatic pistols. They don't even use the same bullet diameter. Other than the name, there is almost no similarity. In other words, NO.
No, wont fit and would not try