Re: 38's in a 357 Rifle?
It will chamber and fire with no problems.
In a single-shot it will be fine.
In a repeater, like a lever or a pump, because of the shortness of the cartridge it probably will not feed from the magazine.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.