CDNN has recycled SIGs in 357 SIG. There are also 357 SIG barrels for various .40 Caliber pistols.

Geoff
Who notes the 357 SIG was invented to put a 125 gr .357 Magnum equivalent into a semi auto. The FBI had determined the 125 gr .357 Magnum to be the bestest ever pistol round. The SIG comes in about 200 fps slower.