No. You can get a Sig P229 that will fire .357 Sig, but that is not the same as .357 magnum.

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................

SiG P229 in 357

The ammunition is called .357 Sig. Most pistols in .357 Sig can shoot the .40 S&W when you drop in a .40 S&W barrel.

I am trying to make a deal with a coworker who says his 4006 came as a dual caliber gun .40 cal and .357 mag. I know the gun cannot be .357 mag so it must be a .357 sig. I have not yet seen the .357 barrel. I do know that Bar-Sto makes a .357 sig barrel as I just read the article on reloading .357 sig. Search google for 4006*.357 sig.