Yes, you can fire a .357 Sig round (not a .357 Magnum) in it, but you must first change out the .40 barrel for the .357 barrel.
There's only one shot per round with any gun. As for the P226, the 9mm holds 15 rounds, while the .40 and .357 Sig models hold 12.
357 sig is a cartridge that is a relatively high speed handgun round. It is not a pistol itself, many, many pistols are chambered for this cartiridge.
If the weapon is chambered in 357 Magnum, you can fire the round in it.
No - neither a semi-automatic .357 Magnum nor a semi-automatic .357 Sig will. .357 Magnum revolvers can fire .38 Special rounds because 1: they feed from a cylinder which can accommodate the shorter .38 Special round and 2: unlike a firearm with a chamber, the cylinders in a revolver do not need to be headspaced.
Yes
There are a very few semi-auto pistols that shoot .357 magnum (not .357 Sig). While they will fire .38 Special, it is as a single shot- they will not cycle the action.
Have it examined by a gunsmith first. NEVER FIRE AMMUNITION IN A WEAPON NOT DESIGNED AND CHAMBERED FOR IT!
A .357 firearm is typically a revolver or pistol that uses .357 caliber ammunition.
SiG P229 in 357
No. .38 Long Colt was the forerunner to .38 Special- and was originally a black powder cartridge. The .38 Special is more powerful- the .357 magnum is MUCH more powerful. Neither the Special nor the magnum should be fired in a gun chambered for .38 Long Colt. This is VERY dangerous.
Korth
a 357 cal. revolver cartridge WILL fit a colt 357 python. Also, a 38 special will fit a 357 cal. python. The 357 sig cartridge will NOT fit a 357 colt python................ The 357 sig cartridge ONLY fits the sig model pistol For clarity.....the sig 357 is a pistol. But, the 357 python is a revolver................