No sir, they are not.
357sig is a round based on a 40 caliber (or 10mm) cartridge necked down to 9mm (.355 inches). They will not fit or work in a 357mag.
BTW, your use of the

confuses me a bit. It makes me think that your question is in jest. If you are serious and are wishing to "smile" at us then the appropriate emoticon would be this

.
Oh my God, emoticon etiquette. Who'd have thunk?

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Still happily answering to the call-sign Peetza.

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You do not HAVE a soul. You ARE a soul. You HAVE a body.
-C.S. Lewis
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.